Background Immigration Enforcement Priorities Priority Enforcement Program. Under PEP, which was in effect from January 5, 2015 until February 20, 2017, DHS personnel were directed to, among other things, prioritize the apprehension, detention, and removal from the United States of aliens who pose a threat to national security, border security, and public safety, including convicted felons. It further directed DHS personnel to prioritize for removal new immigration violators and those who had been issued a final order of removal on or after January 1, 2014 and to exercise prosecutorial discretion, as appropriate, in accordance with these priorities and existing guidance. A 2011 ICE memorandum identified factors to consider when exercising prosecutorial discretion, such as the length of the individual’s presence in the United States, whether the person or person’s immediate relative has served in the U.S. military, on the basis of humanitarian reasons such as personal or family illness, among other factors. Executive Order 13768. Executive order 13768, issued on January 25, 2017, focuses on immigration enforcement within the United States. Among other things, the executive order lays out the administration’s immigration enforcement priorities for removable aliens. Specifically, the executive order prioritizes for the removal from the United States aliens who are removable based on certain criminal and security grounds in the Immigration and Nationality Act; as well as removable aliens who have been convicted of, charged with, or committed acts that constitute a criminal offense; have engaged in fraud or otherwise abused any government program; or who are determined to otherwise pose a risk to public safety or national security. In addition, it calls for the termination of the PEP and reinstitution of Secure Communities. See table 1 for a description of enforcement priorities for the removal of aliens from the United States under PEP and Executive Order 13768. The Secretary of Homeland Security issued the 2017 DHS memo to implement Executive Order 13768. According to the 2017 DHS memo, in addition to the priorities outlined in the executive order, the Director of ICE, Commissioner of CBP, and Director of U.S. Citizenship and Immigration Services may allocate resources to prioritize enforcement activities as they deem appropriate, such as by prioritizing enforcement actions against convicted felons or gang members. ICE issued a memo further directing efforts to implement the executive order and apply the guidance from the 2017 DHS memo. The ICE memo stated that ICE was to review all existing policies and guidance documents and revise or rescind relevant policies in order to ensure consistency with the executive order. In addition, ICE’s Office of the Principal Legal Advisor (OPLA) issued additional guidance to OPLA attorneys to implement the 2017 DHS memo. OPLA is responsible for providing legal advice, training, and services to support the ICE mission, and for defending the interests of the United States in the administrative and federal courts including immigration court proceedings. See figure 1 for a timeline of DHS memoranda and Executive Order establishing immigration enforcement priorities from 2015 to 2018. Prosecutorial Discretion. Prosecutorial discretion is the longstanding authority of an agency charged with enforcing a law to decide where to focus its resources and whether or how to enforce, or not to enforce, the law against an individual. Due to limited resources, ICE cannot respond to all immigration violations or remove all persons who are determined to be in the United States without legal status, and therefore, must exercise prosecutorial discretion in the enforcement of the law. In accordance with the DHS, ICE, and OPLA memos, agents and officers are to exercise prosecutorial discretion on a case-by-case basis based on the individual facts presented in consultation with the head of the field office, and prosecutorial discretion is not to be exercised in a manner that exempts or excludes a specified class or category of foreign nationals from enforcement of the immigration laws. Agency Roles and Responsibilities ICE’s ERO conducts civil immigration enforcement actions, which includes administrative arrests, detentions, and removals. Arrests. ERO arrests aliens for civil violations of U.S. immigration laws. Through the Criminal Alien Program, ICE identifies and arrests potentially removable aliens who are incarcerated within federal, state, and local prisons and jails. The National Fugitive Operations Program identifies and arrests removable aliens who are at-large. ICE does not detain all aliens it arrests, due to lack of bed space, among other factors. To inform custody decisions for aliens who are arrested and not subject to mandatory detention, ICE guidance requires officers to consider certain factors, including risk of flight, risk of harm to public safety, and special vulnerabilities. For example, individuals with a physical or mental illness or disability, or individuals who fear being harmed in detention based on their sexual orientation or gender identity may be considered for release or alternatives to detention (ATD) based on these special vulnerabilities. The ATD program requires that, among other things, aliens released into the community agree to appear at all hearings and report to ICE periodically. Non-detained Unit. ERO is also responsible for supervising and ensuring that aliens who are not held in detention facilities comply with requirements to appear in immigration court for their administrative removal proceedings. ICE uses one or more release options when it determines that an alien can be released from ICE custody—including bond, order of recognizance, order of supervision, parole, and on condition of participation in the ATD program. Total ATD enrollment numbers ranged from about 29,000 in calendar year 2015 to over 78,000 in calendar year 2018. ICE does not track specific characteristics of individuals enrolled in ATD programs, including aliens who are pregnant, nursing, disabled, elderly, primary caregivers of minor children, among others. ICE may also release aliens on bond or an order of recognizance who do not pose a threat to public safety, present a low risk of flight, and who are not required to be detained. In addition, in rare instances, ICE may release an alien on an order of supervision when there is no significant likelihood of removal in the reasonably foreseeable future. For example, ICE may not be able to coordinate travel arrangements for certain aliens with final orders of removal who are from countries with which the United States does not have repatriation agreements. An alien subject to a final order of deportation or removal may also request a stay of deportation or removal. ICE may also release certain aliens on parole for urgent humanitarian reasons or significant public benefit, or for a medical emergency or legitimate law enforcement objective, on a case-by-case basis. Detentions. ICE is responsible for providing safe, secure, and humane confinement for detained aliens in the United States who may be subject to removal while they await the resolution of their immigration cases or who have been ordered removed from the United States. This includes aliens transferred to ICE from CBP who were apprehended at or between ports of entry. In fiscal year 2019, ERO oversaw the detention of aliens in 147 facilities authorized to house detainees for over 72 hours. ICE manages these facilities in conjunction with private contractors, state and local governments, and through contract with another federal agency. Within ERO, ICE Health Service Corps (IHSC) is responsible for providing direct medical, dental, mental health care, and public health services to detainees in 20 facilities authorized to house detainees for over 72 hours. Facilities serviced by IHSC include service processing centers, contract detention facilities, dedicated intergovernmental service agreement facilities, and family residential centers. IHSC medical staff are to monitor and implement policy provisions related to pregnant and mentally ill detainees. At detention facilities that are not staffed with IHSC personnel, similar services are provided by local government staff or private contractors and overseen by ICE. Removals. ICE removes aliens who have been determined to be removable and not eligible for any requested relief or protection pursuant to an administrative final order of removal. A removal is defined as the compulsory and confirmed movement of an inadmissible or deportable alien out of the United States. ICE removals include both aliens arrested by ICE and aliens who were apprehended by CBP and transferred to ICE. ERO operates across 24 areas of responsibility nationwide and each area of responsibility is led by a field office director. Each ERO field office director is required by ICE policy to designate supervisory level employees to serve, as a collateral duty, as field liaisons for their area of responsibility tasked with monitoring and implementing the provisions of policies for certain selected populations. These field liaison roles include the LGBTI Field Liaison, Child Welfare Field Point of Contact, Supporting Disability Access Coordinator, and Juvenile Coordinator. In addition to ERO and OPLA, ICE Homeland Security Investigations (HSI) conducts worksite enforcement operations among other law enforcement operations such as oversight of the Student and Exchange Visitor program. This includes arresting undocumented workers and employers who knowingly hire them. We did not include HSI worksite enforcement arrests in our analysis of ICE arrest data because we were unable to identify the number of unique arrests in these data for the purpose of depicting general arrest trends. ERO Arrests, Detentions, and Removals Varied during Calendar Years 2015 through 2018, Increasing Overall ERO arrests, detentions, and removals varied during calendar years 2015 through 2018, and increased overall for the period, as shown in figure 2. Specifically, males, aliens from four countries—Mexico, Guatemala, El Salvador, and Honduras—and convicted criminals accounted for the majority of ICE arrests and removals. The majority of ICE detentions were made up of males, aliens from the same four countries, and non- criminals. See appendix II for additional information on ERO arrests, detentions, and removals by gender, country of citizenship, arresting agency, and criminality. ERO Arrests. The number of ERO arrests varied from calendar years 2015 through 2018 but increased overall from 112,870 in 2015 to 151,497 in 2018, see figure 2 above. Male aliens, citizens of four countries— Mexico, Guatemala, El Salvador and Honduras—and arrests of aliens from state and local jails, through the Criminal Alien Program, accounted for the majority of these arrests each year from 2015 through 2018. Further, ERO arrests increased in all ERO areas of responsibility from calendar years 2015 and 2016, when PEP was in effect, to calendar years 2017 and 2018, following implementation of the 2017 DHS memo. Arrests of convicted criminals accounted for the majority of arrests in all areas of responsibility during both periods. However, as shown in figure 3, the proportion of arrests of convicted criminals decreased in each area of responsibility due to an increased number of arrests of non-criminals following the implementation of the 2017 DHS memo. See appendix II for additional information on ERO arrests by gender, country of citizenship, arresting agency, and criminality. ERO Detentions. The number of ERO detentions varied from calendar years 2015 through 2018 but increased overall from 324,320 in 2015 to 438,258 in 2018. Male aliens and citizens of four countries—Mexico, Guatemala, El Salvador and Honduras—collectively accounted for most ERO detentions. The majority of detentions resulted from CBP arrests at or between ports of entry. While the number of ERO detentions of convicted criminals stayed relatively stable from 2015 to 2018, the number of detentions of non-criminals increased from 171,856 in 2015 to 279,469 in 2018 and accounted for the majority of ERO detentions each year, as shown in figure 4. See appendix II for additional information on detentions by gender, country of citizenship, arresting agency, and criminality. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” According to ICE officials, administrative arrests of non-criminals include individuals who have been charged but not convicted of a crime as well as those with no prior criminal history. According to ICE, ICE officers electronically request and retrieve criminal history information about an alien from the FBI’s National Crime Information Center database, which maintains a repository of federal and state criminal history information, and other sources. We used ICE’s determination of criminality for our analysis. ERO Removals. The number of ERO removals varied from calendar years 2015 through 2018 but increased overall from 231,559 in 2015 to 261,523 in 2018. Male aliens and citizens of four countries—Mexico, Guatemala, El Salvador and Honduras—collectively accounted for most ERO removals. The majority of removals resulted from CBP arrests at or between ports of entry. While removals of both convicted criminals and non-criminals increased overall, removals of convicted criminals accounted for the majority of removals each year, see figure 5. See appendix II for additional information on removals by gender, country of citizenship, arresting agency and criminality. ICE Has Operational Policies for Certain Selected Populations, and Revised Its Policies As Needed to Align with the 2017 DHS Memo According to ICE officials, in early 2018, ERO conducted a review of all existing policies and related documents to help ensure alignment with the 2017 DHS memo, resulting in operational policies related to six of the eight selected populations discussed in this report. The six policies in effect as of July 2019 for the selected populations provide direction and guidance to ERO officers on the identification, detention, care, and removal of aliens who are: individuals with mental disorders, transgender, individuals with disabilities, parents of minors, pregnant, and juveniles. Of the six policies in effect, three were not impacted by the 2017 DHS memo and ERO did not make changes to these policies; two were impacted by the 2017 DHS memo and were revised to remove language ERO determined to be inconsistent with the memo; and guidance on managing juveniles was first issued after the 2017 DHS memo. For the remaining two populations, ERO does not have a separate policy on care provided to detainees who are nursing and as a result of the policy review, rescinded a prior policy related to exercising prosecutorial discretion for elderly individuals, as shown in figure 6. Individuals with Mental Disorders. In May 2014, ICE issued a memo titled Identification of Detainees with Serious Mental Disorders or Conditions, which sets forth procedures to assist ICE and detention facility personnel in identifying detainees with serious mental disorders or conditions in order to assess appropriate facility placement and treatment. To identify individuals with mental disorders, ICE’s national detention standards require facilities to conduct an initial medical screening for all detainees, including a documented mental health screening, a 14-day full medical assessment, with mental health components, and timely referral for follow-up mental evaluations, diagnosis, and treatment. ICE’s policy also requires detention facilities to notify ICE field office directors of detainees with specified serious mental disorders. In addition, the policy requires that relevant personnel meet regularly to monitor the cases of detainees with serious mental disorders until their removal or release. ERO officials in all six areas of responsibility we visited said that these meetings are conducted weekly or biweekly with attorneys, medical staff, and ERO management staff to discuss and evaluate the needs of each detainee’s medical care and security needs. According to ICE, this memo did not need to be revised to align with the 2017 DHS Memo. Our analysis of ICE data shows that the number of detentions of individuals with mental disorders at IHSC-staffed facilities varied from calendar years 2015 through 2018 but increased overall from 8513 to 8796 individuals. Transgender Individuals. In June 2015, ICE issued a memo titled Further Guidance Regarding the Care of Transgender Detainees, which provides guidance regarding the placement and care of transgender adult detainees in ERO custody. This memo provides guidance for initial processing of transgender detainees who voluntarily disclose their gender identity to detention officers. Further, when a detainee self-identifies as transgender, the memo directs ERO officers to make individualized placement determinations to ensure the detainee’s safety, and to ensure the facility chosen for placement is able to provide appropriate care for the individual, and to the extent practicable to consider the availability of medical personnel who have experience providing care and treatment to transgender detainees, including the delivery of hormone therapy. This memo also directs ERO to designate a National LGBTI Coordinator to serve as the primary point of contact and subject matter expert for ERO regarding the care and treatment of detainees in ERO custody who self- identify as transgender. Specifically, the National LGBTI Coordinator is to evaluate and report information from all relevant ICE data systems regarding the demographics, care, and custody of transgender detainees and ensure field compliance with the provisions of this memo, among other things. Further, each field office is required to have a LGBTI Field Liaison, appointed by the Field Office Director. The memo directs LGBTI Field Liaisons to provide regular updates to the national ERO LGBTI Coordinator and ERO Headquarters on the progress of implementing and maintaining the provisions of this memo, which includes determining the appropriateness of facilities to house transgender detainees. In addition, the memo requires certain detention facilities to convene a meeting no later than 72 hours after a transgender detainee’s arrival to the facility to assess medical, psychological, and housing needs. During our site visits, officers in three of the six areas of responsibility we visited said that they conduct these meetings with relevant ERO management staff and medical officials in accordance with the memo. According to ICE officials, the transgender care memo did not need to be revised to align with the 2017 DHS Memo. The transgender care memo states that field office directors may exercise prosecutorial discretion for transgender individuals who are not subject to mandatory detention. Field ERO officers in five of the six areas of responsibility we visited explained that ERO generally does not detain transgender individuals unless their criminal histories warrant detention, in accordance with the memo. Specifically, officers in three of these five areas of responsibility reported that transgender individuals are likely to be released on bond or under an order of supervision. However, in the sixth area of responsibility, one ERO officer observed an increase in the detention of transgender individuals beginning in early 2017, which the official attributed to the revised priorities described in the 2017 DHS memo. In addition, attorneys from three NGOs we met with also observed an increase in the detention of transgender individuals or described ongoing challenges related to a decrease in the availability of dedicated transgender housing facilities. They also provided anecdotes of transgender clients who had been detained or who experienced challenges obtaining access to appropriate medical care while in detention. Our analysis of ICE data shows that the number of detentions of transgender individuals increased from 237 in calendar year 2016 to 284 in calendar year 2018. While ICE does not have separate policies for aliens who are lesbian, gay, bisexual, or intersex, the national LGBTI coordinator and LGBTI field liaisons also serve as subject matter experts for the care and treatment of these detainees. In addition, the transgender care memo prohibits discrimination or harassment of any kind based on a detainee’s sexual orientation or gender identity. As such, ERO officers may take steps to protect a detainee who expresses safety concerns based on their sexual orientation, according to ERO officials. According to ERO officers in five of the six areas of responsibility we visited, they do not ask detainees about sexual orientation unless the individual voluntarily discloses this information. Additionally, ERO officers in the same five areas of responsibility stated that they do not take sexual orientation into consideration for detention or housing decisions, unless an individual specifically requests protective custody due to safety concerns or harassment. Individuals with Disabilities. In December 2016, ERO issued a directive titled Assessment and Accommodations for Detainees with Disabilities, which establishes policy and procedures for ERO to oversee and communicate with detention facilities on the identification, assessment, and accommodation of detainees with disabilities. According to this directive, ERO field leadership is to notify detention facilities in each area of responsibility of their existing obligations under federal law to accommodate detainees with disabilities. These obligations include maintaining a process to identify these detainees through observation, assessments, screenings, and self-identification; notifying detainees of their right to request accommodations; and establishing a process to inform a detainee of the final decision on the request for accommodations, including whether the facility will provide alternative accommodations that are equally effective as those requested; among other things. In addition, this directive requires ERO to designate an ERO disability access coordinator who is to serve as the primary point of contact and subject matter expert for ERO headquarters and the field regarding the accommodation of, and communication with, detainees with disabilities in ERO custody. Among other duties, the ERO disability access coordinator is responsible for evaluating information from all relevant ICE data systems regarding the identification, care, approved accommodations and custody of detainees with disabilities; as well as maintaining records of detainees with communication and mobility impairments, including records of denials of detainee requests for accommodations by facilities. According to the directive, detainees with communication impairments include detainees with hearing, visual, and speech impairments (e.g., detainees who are deaf or hard of hearing, blind, or nonverbal). Detainees with mobility impairments include detainees with physical impairments who require a wheelchair, crutches, prosthesis, cane, other mobility device, or other assistance. Accommodations for these impairments may include accessible showers, Braille material, or note takers for persons with physical and sensory impairments, among other things. The ERO disability access coordinator is also responsible for helping to ensure compliance with the provisions of this directive. Field office directors are required to appoint at least one supervisory-level employee to serve as the supporting disability access coordinator for each area of responsibility. Supporting disability access coordinators are responsible for serving as the main point of contact for their field office regarding compliance with federal law and DHS, ICE, and ERO regulations, detention standards, policies, and procedures related to detainees with disabilities. Supporting disability access coordinators are also responsible for collaborating and communicating with ERO headquarters, field office, detention facility, and health care personnel to monitor the care and treatment of detainees with disabilities, among other things. In all six areas of responsibility we visited, supporting disability access coordinators and medical staff told us that they track detainees who receive accommodations for communication and mobility impairments by recording the accommodation on a form that they submit to ERO headquarters. According to ICE, the Assessment and Accommodations for Detainees with Disabilities directive did not need to be revised to align with the 2017 DHS Memo. This directive states that it is meant to implement and complement the requirements of Section 504 of the Rehabilitation Act of 1973 and states that detainees with disabilities will be provided an equal opportunity to access, participate in, or benefit from in-custody programs, services, and activities, and that detainees with disabilities will be provided with auxiliary aids and services as necessary to allow for effective communication. Further, the directive states that a field office director may consider releasing from ICE custody a detainee with an impairment or disability who is not subject to mandatory detention. ERO officers in five areas of responsibility we visited reported that they consult with the supporting disability access coordinator, medical staff, or a supervisor to determine whether local detention facilities are able to provide appropriate accommodations. Our analysis of ICE data shows that the number of detentions of individuals with communication and mobility impairments increased from 434 to 530 in calendar years 2017 to 2018. Parents or Legal Guardians of Minors. In August 2017, ICE issued a policy titled Detention and Removal of Alien Parents or Legal Guardians, which provides guidance regarding the detention and removal of alien parents and legal guardians, including those with children who are U.S. citizens and legal permanent residents and parents with ongoing cases in family court or child welfare proceedings in the United States. This policy directs ERO to designate a child welfare coordinator to serve as the primary point of contact and subject matter expert for all ICE personnel regarding child welfare issues related to detained alien parents. The child welfare coordinator is also responsible for evaluating information from all relevant ICE data systems regarding detained alien parents or legal guardians of U.S. citizen and legal permanent resident minors and sharing appropriate information with field points of contact, among other things. Specifically, this policy directs field office directors to make appropriate arrangements for detained parents to attend child welfare proceedings. ERO officers in three of the six areas of responsibility we visited stated that they coordinate visits to family courts for the detained parent to appear at these hearings. The field office director in each area of responsibility is to designate a field point of contact to communicate with the child welfare coordinator and address public inquires related to detained parents or legal guardians in ERO custody. The August 2017 policy superseded an August 2013 policy titled Facilitating Parental Interests in the Course of Civil Immigration Enforcement Activities, which ERO revised to align with the 2017 DHS memo. In the revised policy, ERO removed language indicating that field office directors should weigh whether an exercise of prosecutorial discretion may be warranted for an alien who is a parent or legal guardian of a U.S. citizen or legal permanent resident minor or is a primary caretaker of a minor, and to exercise such discretion as early as possible. ERO officers in five of the six areas of responsibility we visited stated that they typically do not detain parents of minors, unless criminal history warrants detention. Attorneys we met with from a NGO that provides services to immigrant families and refugees stated that they have observed an increase in the number and length of detentions of parents or legal guardians of minors since January 2017. We were not able to identify trends in detention of detained parents because ERO does not collect or maintain data on this population in a readily available format. Pregnant Women. In December 2017, ICE issued a directive titled Identification and Monitoring of Pregnant Detainees, which sets forth policy and procedures to ensure pregnant detainees in ICE custody for immigration violations are identified, monitored, tracked, and housed in an appropriate facility to manage their care. According to ICE policy on women’s health, pregnant women are identified upon arrival to a detention facility because all women of childbearing age undergo a pregnancy test during intake processing. According to the December 2017 directive, IHSC personnel are responsible for notifying the field office director and IHSC headquarters, as soon as practical, when a pregnant detainee is identified; monitoring the condition of pregnant detainees, including the general health of the pregnant detainee and medical condition of the fetus; and communicating with the field office director about any specific risk factors or concerns. In addition, IHSC personnel are to provide oversight and review of facility capabilities to determine if the needs of a pregnant detainee can be accommodated and recommend to the field office director when a transfer to another facility is necessary for appropriate medical care. Further, IHSC personnel are to develop and maintain a system for tracking and monitoring all pregnant detainees. This policy superseded an August 2016 version with the same title, which ERO revised to align with the 2017 DHS memo, according to ICE officials. In the revised version, ERO removed language stating that absent extraordinary circumstances pregnant women will generally not be detained by ICE. In five of the six areas of responsibility we visited, ERO officers stated that unless mandatory detention is required, they still generally avoid detaining pregnant women. In addition, ERO officers in all six areas of responsibility we visited stated that they are less likely to detain and may release a woman who is having a high risk pregnancy or in the third trimester of her pregnancy. However, an official in the sixth area of responsibility noted that under the revised policy, pregnant women may be detained during the third trimester, if she is likely to be removed quickly and has medical clearance to fly. Officers in two of the six areas of responsibility we visited noted that pregnant women may also be released on bond, under an order of supervision, or other non- detention options, after assessing the facts of the case. Attorneys and policy advocates we met with from three NGOs that represent a range of immigrant populations stated that they have observed increases in the detention of pregnant women since January 2017. Attorneys from another NGO we met with provided anecdotes of cases of pregnant detainees who experienced medical challenges, including miscarriages while in custody. Our analysis of ICE data shows that the number of detentions of pregnant women varied, but increased overall, from 1380 in calendar year 2016 to 2098 in calendar year 2018. Juveniles. In April 2018, ICE issued the Field Office Juvenile Coordinator Handbook to guide ERO staff in processing, transporting, managing, and removing juveniles—persons encountered by ERO who have not reached 18 years of age. Field office juvenile coordinators, who serve as local subject-matter experts on juvenile matters for each area of responsibility, provide policy guidance to ERO personnel within their areas of responsibility, and assist with case review and custody redeterminations. Field office juvenile coordinators are also required to coordinate with other federal agencies including the Office of Refugee Resettlement, where juveniles designated as unaccompanied alien children are typically transferred. According to ERO policy, unaccompanied alien children apprehended by ERO or transferred into ERO custody by CBP are to be placed in the care of the Office of Refugee Resettlement within 72 hours of identification, if they are not repatriated at the border. The Field Office Juvenile Coordinator Handbook was released after the 2017 DHS memo and aligns with the 2017 DHS Memo. According to officers in four of the six areas of responsibility we visited, ERO does not target juveniles for arrests, unless they have criminal records. For example, officers we met with in one area of responsibility stated that ERO typically does not target juveniles in that location, unless they are affiliated with gangs, because they are unlikely to pose a public safety threat. Our analysis of ICE data shows that the number of arrests of juveniles varied, but increased overall, from calendar years 2015 through 2018. We excluded juveniles from our analysis of individual ICE detention data because ICE is generally not responsible for detaining juveniles, as discussed above. Nursing Women. While ICE does not have a separate policy on the care, detention, or removal of women who are nursing, the 2017 Directive on Women’s Health Services provides guidance to IHSC staff on the delivery and administration of health services to this population. According to this directive, women who are nursing are identified during initial processing before being placed into custody at a detention facility because ERO officials and medical personnel are required to ask women if they are breastfeeding. Medical personnel make recommendations pertaining to the detention of women who are nursing, and in most cases, these detainees are placed in IHSC-staffed facilities. IHSC personnel record and use this information to monitor the care and needs of women who are nursing, according to IHSC officials. In five of the six areas of responsibility we visited, officers stated that they typically do not detain women who are nursing, unless their criminal histories warrant detention. Specifically, health officials in one of the five areas of responsibility explained that if a nursing mother is detained, she is typically released within a few hours or placed on bond or order of supervision. Our analysis of ICE data shows that the number of detentions of nursing women at IHSC-staffed facilities varied from calendar years 2015 through 2018 but increased overall from 157 in 2015 to 381 in 2018. Elderly Individuals. ICE no longer has a policy guiding the detention or care of elderly detainees. According to ICE guidance on assessing individuals with special vulnerabilities during the intake process, ICE generally considers someone to be elderly starting at age 65. However, the guidance instructs agents and officers to assess whether these individuals have physical indicators of infirmity or fragility caused by old age when making decisions regarding detaining or releasing them. In February 2018, as part of its effort to align internal policies with the 2017 DHS memo, ERO rescinded a 2009 policy directing officers to administratively close cases of non-criminal fugitives who are 70 years old or older for humanitarian/health reasons. ERO officers in five of the six areas of responsibility we visited reported that they do not target individuals who are elderly and continue to consider criminal history and medical condition when deciding whether to detain them. For example, officials in one of these five areas of responsibility explained that someone who committed an aggravated felony would be subject to mandatory detention regardless of age, but if the individual has a serious medical condition, such as advanced cancer, ERO may decide to release them from custody because the agency would be responsible for the cost of their medical treatments while they are in custody. Officers in the sixth area of responsibility said they have started to detain individuals who are elderly following the issuance of the 2017 DHS memo, but noted that they coordinate with the courts to expedite these hearings before an immigration judge who may order the release of an elderly detainee. Attorneys we met with from a NGO that provides services to immigrant families and refugees stated that they have observed an increase in detentions of individuals who are elderly, and only those with serious medical issues were considered for release. Our analysis of ICE data shows that the number of detentions of individuals who were elderly varied, increasing overall, from 882 in calendar year 2015 to 1159 in calendar year 2018. Data Indicate Detentions of Selected Populations Varied, Increasing Overall; but ICE Lacks Readily Available Data on All Detained Parents or Legal Guardians of Minors Available ICE data show that detentions of most of the selected populations in our review varied between calendar years 2015 and 2018. Specifically, detentions of transgender individuals and pregnant women increased from calendar years 2016 to 2018, after ICE began collecting data for these populations. Similarly, detentions of individuals with disabilities increased from 2017 to 2018, after ICE began collecting data for this population. Detentions of individuals with mental disorders and nursing women at IHSC-staffed facilities varied from calendar years 2015 to 2018. Finally, detentions of individuals who were elderly varied, increasing overall during the same timeframe. We were unable to obtain data on parents or legal guardians of minors in ICE custody because ICE does not collect or maintain data on this population in a readily available format. ICE Data Show Detentions of Most Selected Populations Varied, Increasing Overall Detentions of Transgender Individuals Increased from 2016 through 2018; the Majority Resulted from CBP Arrest and Were Detentions of Non-Criminals ICE began collecting and maintaining data on transgender individuals who voluntarily disclose their gender identity to ICE officers in November 2015, as previously discussed. ERO officials said they use these data to monitor the placement and care of transgender individuals in ICE custody, in accordance to ICE’s memo on Further Guidance Regarding the Care of Transgender Detainees. These data show that the number of detentions of transgender individuals increased from calendar years 2016 through 2018, as shown in table 2. Detentions resulting from CBP arrests accounted for about half of the total detentions of transgender individuals in 2016 and 2017, increasing to 69 percent in 2018. Also shown in table 2, detentions of non-criminal transgender individuals increased from calendar years 2016 through 2018, increasing from 46 percent of total detentions of transgender individuals in 2016 to 71 percent in 2018. Detentions of non-criminal transgender individuals include both detentions of individuals with pending criminal charges (ranging from 12 to 24 percent) and individuals with no recorded criminal history (ranging from 76 to 88 percent). Detentions resulting from CBP arrests comprised most of these detentions (ranging from 77 to 91 percent). Detentions of transgender individuals with criminal convictions decreased over the same period, and most resulted from ICE arrests (ranging from 71 to 84 percent). For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” According to ICE officials, administrative arrests of non-criminals include individuals who have been charged with, but not convicted of a crime, (we refer to these as “aliens with pending criminal charges”), as well as those with no prior criminal history, (we refer to these as “aliens with no recorded criminal history”). According to ICE, ICE officers electronically request and retrieve criminal history information about an alien from the FBI’s National Crime Information Center database, which maintains a repository of federal and state criminal history information, and other sources. We used ICE’s determination of criminality for our analysis. Detentions of Individuals with Disabilities Increased from 2017 to 2018; the Majority Resulted from ICE Arrests and Were Detentions of Convicted Criminals ICE began collecting and maintaining data on certain detainees with disabilities–i.e., those with communication and mobility impairments— who disclosed their impairment or who were identified by facility staff as having an impairment in January 2017, in accordance with its directive, titled Assessment and Accommodations for Detainees with Disabilities. These data show that detentions of individuals with disabilities increased from calendar years 2017 to 2018, as shown in table 3. Detentions resulting from ICE arrests accounted for the majority of these detentions (70 percent in 2017 and over 50 percent in 2018). Also shown in table 3, detentions of convicted criminals with disabilities decreased from calendar years 2017 to 2018, and accounted for the majority of total detentions of this population (67 percent in 2017 and 53 percent in 2018). Most of these detentions resulted from ICE arrests (89 percent in 2017 and 72 percent in 2018). Detentions of non-criminals in this population increased from calendar years 2017 to 2018. Detentions of individuals with no recorded criminal history accounted for most detentions of non-criminals in this population (71 percent in 2017 and 79 in 2018 percent), and the majority resulted from CBP arrests (68 percent in 2017 and 74 percent in 2018). ICE began collecting and maintaining data on pregnant women in ICE’s custody in June 2015. IHSC officials said they use these data to monitor the condition of pregnant women in ICE custody, including the term of the pregnancy, general health of the pregnant detainee, and medical conditions of the fetus, in accordance to ICE’s directive on Identification and Monitoring of Pregnant Detainees. These data show that the number of detentions of pregnant women varied, but increased overall from calendar years 2016 through 2018, as shown in table 4. Detentions resulting from CBP arrests accounted for most of the total detentions of pregnant women each year (ranging from 90 to 96 percent). Also shown in table 4, detentions of non-criminal pregnant women varied from calendar years 2016 through 2018, but increased overall. Detentions of non-criminal pregnant women accounted for most of the total detentions of pregnant women each year (ranging from 91 to 97 percent), and detentions of women with no recorded criminal history accounted for almost all of these detentions (ranging from 96 to 99 percent). Detentions of convicted criminal pregnant women also increased overall for the period. ICE began collecting and maintaining data needed to identify individuals with mental disorders at IHSC-staffed facilities in August 2013. According to IHSC officials, ICE does not collect these data for non-IHSC staffed facilities, in part because many of these facilities do not have electronic health records. However, IHSC personnel are notified of detainees with mental disorders at non-IHSC staffed facilities and these individuals may be transferred to another facility if the current facility is unable to provide appropriate care. While we were not able to present the overall number of detentions of individuals with mental disorders in ICE custody, we reviewed available ICE data to indicate the number and characteristics of detentions of individuals with mental disorders at IHSC- staffed facilities. These data show that the number of detentions of individuals with mental disorders at IHSC-staffed facilities varied from calendar years 2015 through 2018, as shown in table 5. Detentions resulting from CBP arrests accounted for the majority of these detentions (ranging from 53 to 67 percent) in 2015, 2016, and 2018. In 2017, detentions resulting from ICE arrests accounted for the majority (51 percent) of these detentions. Also shown in table 5, detentions of non-criminals with mental disorders varied from calendar years 2015 through 2018. These detentions accounted for the majority of total detentions of individuals with mental disorders in 2015, 2016, and 2018 (ranging from about 53 to 58 percent). Detentions of individuals with no recorded criminal history accounted for most detentions of non-criminals for this population (ranging from 79 to 92 percent), and most resulted from CBP arrests (ranging for 77 to 97 percent). Detentions of convicted criminals with mental disorders varied over the period and the majority resulted from ICE arrests (ranging from 71 to 79 percent). IHSC began collecting and maintaining data needed to identify women who are nursing at IHSC-staffed facilities, which is where ICE typically detains women who are nursing, in August 2013. These data are used to monitor the care and needs of women who are nursing, according to IHSC officials. While we were not able to present the overall number of detentions of nursing women in ICE custody, we reviewed available ICE data to indicate the number and characteristics of detentions of nursing women at IHSC-staffed facilities. These data show that the number of detentions of nursing women at IHSC-staffed facilities varied from calendar years 2015 through 2018, as shown in table 6. Detentions resulting from CBP arrests accounted for most of the detentions of women who were nursing each year (ranging from 98 to 99 percent). Also shown in table 6, detentions of both non-criminal and convicted criminal nursing women at IHSC-staffed facilities varied from calendar years 2015 through 2018. Detentions of non-criminal women who were nursing accounted for most of the total detentions of nursing women at IHSC-staffed facilities each year (ranging from 98 to 99 percent), and detentions of women who were nursing with no recorded criminal history accounted for almost all of these detentions (ranging from 99 to 100 percent), and resulted from CBP arrests (ranging from 98 to 100 percent). From calendar year 2015 through 2018, ICE collected and maintained data on a detainee’s date of birth and is able to identify whether an individual is elderly, defined as someone who is over 65 years old, by calculating the individual’s age at the time they are detained. ICE does not collect or maintain specific data on whether an individual is elderly because it does not have a separate policy for elderly detainees. Rather, ICE considers an individual’s health, criminal history, and other factors when making detention determinations, according to officials. ICE data show that the number of detentions of individuals who were elderly varied, but increased overall from calendar years 2015 through 2018, as shown in table 7. Detentions resulting from ICE arrests accounted for the majority of detentions of individuals who were elderly each year (ranging from 64 to 71 percent). Also shown in table 7, detentions of both non-criminal and criminal individuals who were elderly varied from calendar years 2015 through 2018, and increased overall. Detentions of convicted criminals accounted for the majority of detentions of individuals who were elderly each year (ranging from 65 to 74 percent) and most of these detentions resulted from ICE arrests (ranging from 82 to 85 percent). Detentions of individuals who were elderly with no recorded criminal history accounted for most detentions of non-criminal individuals who were elderly (ranging from 80 to 91 percent), and the majority resulted from CBP arrests (ranging from 70 to 74 percent). ICE Does Not Readily Know How Many Parents or Legal Guardians of U.S. Citizens and Legal Permanent Resident Minors It Has in Custody While ICE collects information on detained parents or legal guardians, including those of U.S. citizens and legal permanent resident minors, this information is not maintained in a readily available format that would allow ICE to systematically identify such detained parents and ensure officers are collecting information on this population as required by policy. According to ICE officials, before making custody determinations, ICE officers are instructed to inquire whether arrested aliens are parents or legal guardians of minors, including parents of U.S. citizen and legal permanent resident minors. ICE officers are to enter this information in a separate tab in the ENFORCE Alien Detention Module, a subsystem within ICE’s data system for recording information about individuals in its custody. This information on detained parents, however, cannot be readily searched to identify all detained parents or legal guardians in custody. Therefore, ICE does not know how many detained parents or legal guardians are in custody, including parents of U.S. citizen and legal permanent resident minors, during any given time. In accordance with a currently recurring Congressional reporting requirement, ICE generates a semi-annual report on removals of parents of U.S.-born citizen children. However, officials explained that they must review this information manually to generate the report and added that ICE is not required to report in an aggregate way on detained parents of U.S. citizen or legal permanent residents. ICE also tracks individual cases requiring specific actions, such as arranging transportation for parents to attend child welfare proceedings or accommodating visitation for parents with mandated child visitation schedules. However, according to ICE officials, these parents represent a small proportion of all parents in ICE custody. ICE’s policy on Detention and Removal of Alien Parents or Legal Guardians requires ICE personnel to enter information into ENFORCE once a detained alien has been determined to be a parent or legal guardians of a U.S. citizen or legal permanent resident minor. As previously mentioned, this policy also requires the Child Welfare Coordinator to evaluate information from all relevant ICE data systems regarding detained parents or legal guardians of minors, including parents of U.S. citizen and legal permanent resident minors, and share appropriate information with the ERO field points of contact. ICE’s policy further states that in pursuing the enforcement of U.S. immigration laws against parents of minors, ICE personnel should remain cognizant of the impact enforcement actions may have on U.S. citizen or legal permanent resident minors. Standards for Internal Control in the Federal Government call for design of any data collection to collect quality information, and for management to use quality information to make informed decisions and evaluate the entity’s performance in achieving key objectives and addressing risks. Because information entered into ICE’s data system on detained parents or legal guardians, including those of U.S. citizen or legal permanent resident minors, is not maintained in a readily available format, ICE headquarters officials cannot ensure that ICE officers are collecting and entering this information into the system as required by policy. According to ICE officials, the agency had previously considered implementing a system update to readily identify certain detained parents of minors, but as of October 2019 is no longer considering this update. Collecting and maintaining information in a readily available format on detained parents of U.S. citizen or legal permanent resident minors could help ensure that ICE personnel can identify, evaluate, and share information on this population, as required by ICE policy. In addition, collecting and evaluating this information would provide greater transparency regarding the impacts of ICE’s enforcement actions on U.S. citizen or legal permanent resident minors. Conclusions In 2015, DHS reported that about 12 million aliens were residing in the United States without lawful status or presence, which includes parents of U.S. citizen, legal permanent resident, and alien minors. Through its policies, ICE has established the importance of collecting and maintaining information on detained parents and legal guardians of U.S. citizen and legal permanent resident minors. However, because ICE has not implemented a process to collect or maintain this information in a readily available format, it does not have reasonable assurance that it can identify all detained parents and legal guardians of U.S. citizen and legal permanent resident minors. Therefore, ICE cannot evaluate and share this information and ensure its officers are collecting information on this population in accordance with its policy. Implementing a process to collect and maintain this information in a readily available format would allow ICE to better assess the impacts of its enforcement actions on U.S. citizen and legal permanent resident minors and help improve ICE oversight efforts. Recommendation for Executive Action The Director of ICE should implement a process to collect and maintain data in a readily available format on detained parents or legal guardians of U.S. citizen and legal permanent resident minors to ensure that information on this population is entered into ICE’s data system as required by policy. (Recommendation 1) Agency Comments and Our Evaluation We provided a draft of this report for review and comment to DHS. DHS provided comments, which are reproduced in appendix XI. DHS also provided technical comments, which we incorporated, as appropriate. DHS did not concur with our recommendation. Specifically, in its comments, DHS stated that data on detained parents or legal guardians of U.S. citizens and legal permanent residents are available to approved EARM users and that we did not identify any problems with the quality of the data. However, as we noted in our report, these data are not readily available because ICE’s data on family relationships, including parents or legal guardians of U.S. citizens and legal permanent resident minors, can only be accessed by manually reviewing each separate case file in EARM. To that end, we or anyone else wishing to do so are unable to determine whether there are problems with the data as ICE is not able to provide aggregate data that would allow us to assess the quality or to report on these data. In its comments, DHS states that ICE does not have any requirement or need to aggregate data on this particular group and doing so would not better inform ICE’s decision making processes. However, as noted in the report, ICE’s policy states that in pursuing the enforcement of U.S. immigration laws against parents of minors, ICE personnel should remain cognizant of the impact enforcement actions may have on U.S. citizen or legal permanent resident minors. Without making these data readily available, ICE is not able to account for the overall impact of its enforcement actions on U.S. citizen or legal permanent resident minors whose parents or legal guardians have been detained. Additionally, headquarters and field officials we met with during the course of this review agreed that having this information readily available would be useful. They also explained that ICE was developing a method to better track and report on primary caregivers of children. However, in October 2019, ICE officials stated that the agency is no longer considering this improvement. We continue to believe that collecting and maintaining information in a readily available format on detained parents or legal guardians of U.S. citizen or legal permanent resident minors could help ensure that ICE personnel can identify, evaluate, and share information on this population, as required by ICE policy. Without such data, ICE headquarters officials cannot ensure that ICE officers are collecting and entering this information into the system as required. In addition, collecting and evaluating this information would provide greater transparency regarding the impacts of ICE’s enforcement actions on U.S. citizen or legal permanent resident minors. We are sending copies of this report to the appropriate congressional committees, and the Acting Secretary of the Department of Homeland Security. In addition, the report is available at no charge on the GAO website at http://www.gao.gov. If you or your staff have any questions about this report, please contact me at (202) 512-8777 or goodwing@gao.gov. Contact points for our Office of Congressional Relations and Public Affairs may be found on the last page of this report. Key contributors to this report are listed in appendix XII. Appendix I: Objectives, Scope, and Methodology This appendix provides additional information on our objectives, scope, and methodology. Specifically, our objectives were to examine the following questions: 1. What does ICE data show about ICE arrests, detentions, and removals from calendar years 2015 through 2018? 2. What policies are in effect for selected populations and what changes did ICE make to align these policies with the 2017 DHS memo? 3. To what extent does ICE collect data on selected populations in detention and what do these data show? To address our first question, we analyzed individual-level data from the U.S. Immigration and Customs Enforcement (ICE) Integrated Decision Support (IIDS) database, to determine the total number of ICE Enforcement and Removal Operations (ERO) administrative arrests (arrests), detentions, and removals from January 2015 (the start of the Priority Enforcement Program) through December 2018 (to include the first two years for the 2017 DHS Memo). ERO conducts civil immigration enforcement actions, which includes arrests for civil violations of U.S. immigration laws, detentions, and removals. Arrests. We analyzed individual-level arrest data from IIDS to determine the total number of ERO arrests for each calendar year 2015 through 2018. We examined multiple data fields from the individual-level arrest data, including alien file number, family name, given name, gender, country of citizenship, arrest date, area of responsibility, and criminality, among other variables. Because aliens may have multiple arrests, we used alien number and arrest date to identify the unique number of arrests rather than the number of unique aliens who were arrested. We excluded from our analysis arrest records that had a missing alien number, an invalid alien number— i.e., that included all zeroes or had duplicate alien number and arrest date combinations—or records that indicated test in the name fields. We analyzed these data to determine total numbers of arrests by gender, country of citizenship, criminality, arresting program, and area of responsibility. To determine the number of arrests by gender, we analyzed IIDS individual-level arrest data. We also analyzed these data to determine the number of arrests by criminality for each gender, using ICE’s determination of criminality for our analysis, as discussed below. To determine the number of arrests by country of citizenship, we analyzed IIDS individual-level arrest data. ICE obtains country of citizenship data from arrest reports, which may be based on documentation or self-reported. To determine the number of arrests by criminality, we analyzed IIDS individual-level arrest data. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” According to ERO officials, arrests of non-criminals include individuals who have been charged but not convicted of a crime as well as those with no prior criminal history. According to ICE, ICE officers electronically request and retrieve criminal history information about an alien from the FBI’s National Crime Information Center (NCIC) database, which maintains a repository of federal and state criminal history information. ICE officers are also able to manually enter criminal history information in ICE’s data system if they discover additional criminal history information that was not available in NCIC. ICE officers may also check for criminal convictions committed outside the United States, on a case-by-case basis. Most of the ICE data we reviewed indicated criminal or non-criminal history, where criminal included convictions, and non-criminal included both pending criminal charges and other immigration violations. Therefore, wherever we referred to criminality, we used ICE’s determination of criminality—criminal or non-criminal—for our analysis. To determine the number of arrests by arresting program, we analyzed IIDS individual-level arrests data to determine the number of arrests at-large in the communities by ICE’s fugitive operations teams and those resulting from an incarceration in federal, state, and local prisons and jails through the Criminal Alien Program. To determine the number of arrests by ERO area of responsibility, we analyzed IIDS individual-level arrests data for calendar years 2015 through 2018. We also used these data to calculate the proportion of arrests of convicted criminals by ERO area of responsibility. We compared the number of arrests across the 24 ERO areas of responsibility to examine the differences in enforcement actions between the years the Priority Enforcement Program were in effect (2015-2016) and the years immediately following implementation of the DHS memo (2017-2018). We excluded from our analysis arrest records that had a missing or unknown area of responsibility. We also analyzed IIDS individual-level arrest data to determine the total number of arrests of juveniles during calendar years 2015 through 2018. Because aliens may have multiple arrests, we used alien number and arrest date to identify the unique number of arrests rather than the number of unique aliens who were arrested. We excluded from our analysis arrest records that had a missing alien number, an invalid alien number—i.e., that included all zeroes or had duplicate alien number and arrest date combinations. We used these data to determine the total number of arrests of juveniles by age and gender. Detentions. We analyzed individual-level detention data from IIDS to determine the total number of ERO detentions during calendar years 2015 through 2018. We examined multiple data fields from the individual-level detention data, including alien file number, person id, family name, given name, gender, country of citizenship, arresting agency, criminality, detention facility, book-in date, book-out date, release reason, and length of stay, among other variables. Because aliens may have multiple detentions, we used alien number and initial book-in date fields—i.e., the first date the individual is taken into ICE custody—to identify the unique number of detentions rather than the number of unique aliens who were detained. We excluded from our analysis arrest records that had a missing alien number or had an invalid alien number—i.e., that included all zeroes. We analyzed these data to determine total numbers of detentions by gender, country of citizenship, arresting agency, and criminality. To determine the number of detentions by gender, we analyzed IIDS individual-level detention data. We also analyzed these data to determine the number of detentions by arresting agency—ICE or U.S. Customs and Border Protection (CBP)—and criminality for each gender. We included all detentions resulting from both ICE and CBP arrests because ICE is responsible for detaining certain aliens apprehended by CBP at or between ports of entry. To conduct our analysis, we used ICE’s determination of criminality— criminal or non-criminal—which ICE determines by conducting electronic criminal history checks, as previously discussed. To determine the number of detentions by country of citizenship, we analyzed IIDS individual-level detention data. ICE obtains country of citizenship data from arrest reports, which may be based on documentation or self-reported. To determine the number of detentions by arresting agency, we analyzed IIDS individual-level detention data for detentions resulting from ICE arrests and those resulting from CBP arrests at or between ports of entry. To determine the number of detentions by criminality, we analyzed IIDS individual-level detention data. We also examined the extent to which detentions varied by criminality and arresting agency. To conduct our analysis, we used ICE’s determination of criminality— criminal or non-criminal—which ICE determines by conducting electronic criminal history checks, as previously discussed. Removals. We analyzed individual-level removal data from IIDS to determine the total number of ERO removals during calendar years 2015 through 2018. We examined multiple data fields from the individual-level removal data, including alien file number, family name, given name, gender, country of citizenship, criminality, arresting agency, and removal date, among other variables. Because aliens may have multiple removals, we used alien number and removal date to identify the unique number of removals rather than the number of unique aliens. We excluded from our analysis removal records that had a missing alien number, an invalid alien number—i.e., that included all zeroes, or had duplicate alien number and removal date combinations, or records that indicated test in the name fields. We analyzed these data to determine total numbers of removals by gender, country of citizenship, arresting agency, and criminality. To determine the number of removals by gender, we analyzed IIDS individual-level removal data. We also analyzed these data to determine the number of removals by arresting agency and criminality for each gender. To conduct our analysis, we used ICE’s determination of criminality—criminal or non-criminal—which ICE determines by conducting electronic criminal history checks, as previously discussed. To determine the number of removals by country of citizenship, we analyzed IIDS individual-level data. ERO obtains country of citizenship data from arrest reports, which may be based on documentation or self-reported. To determine the number of removals by arresting agency, we analyzed IIDS individual-level removal data for removals resulting from ERO arrests and those resulting from CBP arrests at or between ports of entry. To determine the number of removals by criminality, we analyzed IIDS individual-level removal data. To conduct our analysis, we used ICE’s determination of criminality—criminal or non-criminal— which ICE determines by conducting electronic criminal history checks, as previously discussed. We determined that the data used in each of our analyses were sufficiently reliable for the purposes of this report by analyzing available documentation, such as related data dictionaries; interviewing ICE officials knowledgeable about the data; conducting electronic tests to identify missing data, anomalies, or erroneous values; and following up with officials, as appropriate. We also analyzed arrest data from Homeland Security Investigations (HSI) worksite enforcement to determine the total number of criminal and administrative arrests conducted by HSI worksite enforcement between January 2015 and December 2018. We were unable to use these data for the purposes of reporting the total number of arrests by HSI worksite enforcement for each calendar year. Specifically, we identified combined arrest, charge, and conviction dates in the same field, among other issues, which limited our ability to identify the number of aliens arrested by HSI as a result of worksite enforcement operations each year. To address our second question, we reviewed a master list of ICE policies and interviewed policy officials to identify policies related to individuals with special vulnerabilities. Based on this review as well as input from nongovernmental organizations (NGOs) that serve or represent various populations, we selected eight populations including aliens who are: lesbian, gay, bisexual, transgender, and intersex (LGBTI), individuals with disabilities, juveniles, parents or legal guardians of minors, pregnant, individuals with mental disorders, women who are nursing, or individuals who are elderly. To identify the changes ICE made to align these policies with the 2017 DHS memo, we reviewed specific provisions in the executive order and implementing memoranda. We then analyzed existing policies as well as policies that ICE revised or rescinded to align with the 2017 DHS memo, including policies related to prosecutorial discretion and selected populations. We conducted interviews with officials from ICE headquarters offices, including the Office of the Principal Legal Advisor, Office of Policy, Homeland Security Investigations, as well as program officials within ERO, including Domestic Operations, Fugitive Operations, and Custody Management Divisions. We met with six national organizations that serve or represent immigrants as well as six state or regional organizations that serve or represent immigrants in the locations we visited to obtain their perspectives on how the policies affected the individuals they represent. The perspectives of NGOs are not generalizable and my not be indicative of care provided at all detention facilities. We selected these NGOs to reflect a range of types of populations served or represented as well as based on their proximity to ICE areas of responsibility we visited, see table 8 for more information on the organizations we interviewed. We conducted site visits to six selected ICE ERO areas of responsibility (Atlanta, Dallas, Los Angeles, San Diego, St. Paul, and Washington, D.C.) and interviewed ICE officials to obtain their perspectives on the policy revisions. We selected these locations based on the prevalence of arrests in fiscal year 2017, percent changes in arrests from fiscal year 2016 to 2017, and geographical dispersion. Specifically, we identified locations that had the highest arrest numbers in fiscal year 2017 or the largest percentage increases in arrests from fiscal years 2016 to 2017, and then selected locations that provided wide geographical representation. In each location we met with ERO liaisons and officers responsible for monitoring and implementing the provisions of policies for certain selected populations, as well as detention and deportation officers and supervisors who oversee the detention and removal of aliens, including those with special vulnerabilities. We also met with ICE medical staff in areas of responsibility with this position. In one area of responsibility, we limited our visit to a detention facility and met with the staff at that facility due to its proximity to another area of responsibility we visited. The information obtained from these site visits is not generalizable and may not be indicative of care provided to all populations at all detention facilities, but provided insights into how selected ICE areas of responsibility conduct enforcement activities and implement immigration enforcement policies. To address our third question, we reviewed multiple data sources that ICE uses to track information on certain aliens with special vulnerabilities in detention and matched these data with IIDS individual-level detention data to determine what ICE data show about detentions of selected populations between January 2015 and December 2018. To conduct our analysis, we first excluded records that contained missing alien numbers or alien numbers that were all zeroes. Then, we matched each data source to the IIDS detention data using alien number and excluded additional records we were unable to match. Because aliens may have multiple detentions, we compared the admission or book-in date from each data source with the book-in dates from the IIDS detention data, and excluded additional records with dates beyond 30 days apart. We analyzed this information to determine the total number of detentions for six of the eight selected populations (aliens who are: transgender, individuals with disabilities, pregnant, individuals with mental disorders, nursing, and elderly); and the number of detentions resulting from ICE versus CBP arrests; as well as detentions by criminality and the length of detention for each of these six populations. We excluded juveniles from our analysis because ERO is generally not responsible for detaining juveniles. To determine the extent to which ICE maintains data on detained parents or legal guardians of minors, we reviewed ICE policies pertaining to detained parents, including those that set forth requirements for tracking detained parents or legal guardians of U.S. citizens and legal permanent resident minors. We also interviewed ERO officials about ICE’s data collection processes and any limitations with the data it collects and maintains. We assessed ICE’s efforts to track this population against agency policy. To conduct our analysis of criminality for each population, we used ICE’s determination of criminality—criminal or non-criminal—which ICE determines by conducting electronic criminal history checks, as previously discussed. We also analyzed IIDS data on criminal charges for detentions of aliens that resulted from ICE arrests to determine the type of charges (e.g., immigration-related or other criminal charges) associated with these detentions. To conduct our analysis on length of detention, we compared initial book-in date with the most recent book-out date to calculate the total days in detention for each of our selected populations. Transgender Individuals: We matched ERO records for transgender detainees from calendar years 2016 through 2018 with IIDS individual-level detention data to determine the total number of detentions of transgender individuals, as well as the number of detentions by arresting agency, criminality, and length of detention. We excluded 4 of the unique transgender detainee records for 2016, 33 for 2017 and 27 for 2018. These records were excluded because we were unable to match these records to the IIDS individual level- detention data using alien number and book-in date combinations. According to ICE officials, this may be due to data entry errors. Our analysis is based on those records we were able to match: 228 for 2016, 241 for 2017, and 277 for 2018. ICE also recorded 55 transgender detainees in 2015; however, we excluded these records from our analysis since ICE did not collect complete data on this population in 2015. For the LGBTI population, ICE only collects and maintains data on transgender individuals in detention. Therefore, we were only able to analyze data for this subset of the LGBTI population. Individuals with Disabilities: We matched ERO records for individuals with communication and mobility impairments in ERO custody during calendar years 2017 and 2018 with IIDS individual- level detention data to determine the total number of detentions of these individuals, as well as the number of detentions by arresting agency, criminality, and length of detention. We excluded 5 of the unique detainee records for 2017, and 1 for 2018 because we were unable to match these records to the IIDS individual level-detention data using alien number and book-in date combinations. According to ICE officials, this may be due to data entry errors. Our analysis is based on those records we were able to match: 424 for 2017, and 516 for 2018. When ICE began collecting these data, it included aliens who were placed in detention prior to January 2017. We excluded 99 records for this reason from our analysis since ICE did not collect complete data on this population prior to January 2017. Pregnant Women: We matched ICE Health Service Corps (IHSC) records for pregnant women in ERO custody during calendar years 2016 through 2018 with IIDS individual-level detention data to determine the total number of detentions of pregnant women, as well as the number of detentions by arresting agency, criminality, and length of detention. We excluded 60 of the unique pregnant detainee records for 2016, 20 for 2017 and 32 for 2018 because we were unable to match these records to the IIDS individual-level detention data using alien number and book-in date combinations. According to ICE officials, this may be due to data entry errors. Our analysis is based on those records we were able to match: 1,377 for 2016, 1,150 for 2017, and 2,094 for 2018. ICE also recorded 675 pregnant detainees in 2015; however, we excluded these records from our analysis since ICE did not collect complete data on this population in 2015. Elderly Individuals: We analyzed data records in IIDS for elderly individuals (those 65 years or older at the time of initial book-in) in ERO custody during calendar years 2015 through 2018 to determine the total number of detentions of elderly individuals, as well as the number of detentions by arresting agency, criminality, and length of detention. According to ERO, the agency does not maintain separate data records for elderly individuals in ERO custody; however, ERO officials were able to identify these detainees by calculating their age at the time they were detained. We excluded 4 of the unique elderly detainee records for 2015, 3 for 2016 and 4 for 2018 because we were unable to match these records to the IIDS individual-level detention data using alien number and book-in date combinations. According to ICE officials, this may be due to data entry errors. Our analysis is based on those records we were able to match: 863 for 2015, 736 for 2016, 763 for 2017, and 1,132 for 2018. Individuals with Mental Disorders and Nursing Women: We matched IHSC records for individuals with mental disorders and nursing women detained at IHSC-staffed facilities during calendar years 2015 through 2018 with IIDS individual-level detention data to determine the total number of detentions of each of these populations, as well as the number of detentions by arresting agency, criminality, and length of detention. Because ICE did not maintain data on individuals with mental disorders or nursing women detained at the over 200 non-IHSC staffed facilities, our findings for these two populations are not generalizable, but provided valuable insights into these detentions. We excluded 207 of the unique detainee with mental disorders records for 2016, 850 for 2017, and 1,233 for 2018 because we were unable to match these records with the IIDS individual-level detention data using alien number and book-in date combinations. Our analysis is based on the unique detainee with mental disorders records we were able to match: 8,138 for 2015, 9,466 for 2016, 8,643 for 2017, and 8,501 for 2018. Similarly, we excluded 2 of the unique nursing detainee records for 2015, 3 for 2017 and 5 for 2018 for the same reason. Our analysis is based on the unique nursing detainee records we were able to match: 157 for 2015, 399 for 2016, 564 for 2017, and 381 for 2018. According to ICE officials, this may be due to data entry errors. We assessed the reliability of the data used in each of our analyses by analyzing available documentation, such as related data dictionaries; interviewing ERO officials knowledgeable about the data; conducting electronic tests to identify missing data, anomalies, or erroneous values; and following up with officials, as appropriate. We determined the data were sufficiently reliable for depicting general trends in detentions for the selected populations. We conducted this performance audit from November 2017 to December 2019 in accordance with generally accepted government auditing standards. Those standards require that we plan and perform the audit to obtain sufficient, appropriate evidence to provide a reasonable basis for our findings and conclusions based on our audit objectives. We believe that the evidence obtained provides a reasonable basis for our findings and conclusions based on our audit objectives. Appendix II: Enforcement and Removal Operations Arrests, Detentions, and Removals, 2015-2018 The number of Enforcement and Removal Operations (ERO) administrative arrests (arrests) by gender, country of citizenship, ICE enforcement program, criminality, and area of responsibility from calendar years 2015 through 2018. The number of detentions by gender, country of citizenship, arresting agency, and criminality from calendar years 2015 through 2018. The number of removals by gender, country of citizenship, arresting agency, and criminality from calendar years 2015 through 2018. We analyzed individual-level Immigration and Customs Enforcement (ICE) data to identify ERO arrests, detentions, and removals during calendar years 2015 through 2018. Arrests The Number of Arrests Varied during the Period, Increasing Overall. The number of ERO arrests varied from calendar years 2015 through 2018, and increased more than 30 percent overall for the 4-year period (from 112,870 arrests in 2015 to 151,497 arrests in 2018). During the two years Priority Enforcement Program (PEP) was in effect, the number of ERO arrests varied little, decreasing 5 percent from 2015 to 2016. Following issuance of the 2017 DHS memo, ERO arrests increased 41 percent from 2016 to 2017, and stayed relatively the same from 2017 to 2018. Arrests by Gender. Each year from calendar years 2015 through 2018, arrests of males accounted for the majority of ERO arrests (ranging from 92 to 93 percent), as shown in figure 7. Arrests by Country of Citizenship. Each year from 2015 through 2018, ERO arrests of citizens of Mexico, Guatemala, El Salvador, and Honduras collectively accounted for about 86 percent of all ERO arrests, with individuals from Mexico accounting for the majority (ranging from 59 to 65 percent), as shown in figure 8. All other individual countries collectively accounted for about 14 to 15 percent of total arrests each year. Arrests by ICE Enforcement Program. Arrests of individuals from federal, state and local prisons and jails, through the Criminal Alien Program, accounted for the majority (ranging from 72 to 76 percent) of ERO arrests each calendar year from 2015 through 2018, as shown in figure 9. Arrests of individuals at-large through Fugitive Operations (ranging from 17 to 19 percent) and other programs accounted for the balance of the arrests each year. Criminal Alien Program arrests also accounted for most of the increase in ERO arrests in calendar years 2017 and 2018 (see figure 9). Arrests by Criminality. As shown in figure 10, the number and proportion of ERO arrests of non-criminals aliens increased each year from calendar years 2015 through 2018. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” Specifically, the arrests of non-criminals increased from 13,494 (12 percent of total arrests) in 2015 to 51,513 (34 percent of total arrests) in 2018. According to ERO officials, arrests of non-criminals include individuals who have been charged with but not convicted of a crime as well as those with no prior criminal history. The number of ERO arrests of convicted criminals stayed relatively stable from calendar years 2015 to 2018, ranging between about 91,000 and 107,000. Each of these years, arrests of convicted criminals comprised the majority of total arrests, but decreased from 88 percent in 2015 to 66 percent in 2018. Most arrests of convicted criminals resulted from the Criminal Alien Program (ranging from 76 to 80 percent), followed by Fugitive Operations (ranging from 15 to 19 percent). Arrests by Areas of Responsibility. The number of ERO arrests increased in all ERO areas of responsibility when comparing calendar years 2015 and 2016, when PEP was in effect, to calendar years 2017 and 2018, following implementation of the 2017 DHS memo. These increases ranged from less than 1 percent increase in the Los Angeles area of responsibility to a 99 percent increase in the Miami area of responsibility. Arrests of convicted criminals accounted for the majority of total arrests in all areas of responsibility. However, the proportion of arrests of convicted criminals to total arrests decreased in all areas of responsibility from 2015 and 2016 to 2017 and 2018. This decrease is partially due to the increase in the number of ERO arrests of non- criminals in all areas of responsibility during these years. Table 9 presents total numbers of ERO arrests for each of ERO’s 24 areas responsibility nationwide. It also presents the percentage of arrests of convicted criminals by area of responsibility for calendar years 2015 and 2016 combined and calendar years 2017 and 2018 combined. Detentions The Number of Detentions Varied, Increasing Overall. The number of ERO detentions varied from calendar years 2015 through 2018, and increased more than 30 percent overall for the 4-year period (from 324,320 detentions in 2015 to 438,258 detentions in 2018). ERO detention data include detentions resulting from both ICE and CBP arrests. During the two years PEP was in effect, the number of ERO detentions increased 13 percent, from 324,320 in 2015 to 366,740 in 2016. Following issuance of the 2017 DHS memo, ERO detentions decreased 15 percent from 2016 to 2017 (from 366,740 to 310,309 detentions), and increased 41 percent from 2017 to 2018 (to 438,258 detentions). Detentions by Gender. Each year from calendar years 2015 through 2018, detentions of males accounted for the majority of ERO detentions (ranging from 74 to 81 percent), as shown in figure 11. Detentions by Country of Citizenship. Each year from 2015 through 2018, ERO detentions of citizens of Mexico, Guatemala, El Salvador, and Honduras collectively accounted for the most detentions (ranging from 84 to 89 percent). All other individual countries collectively accounted for 11 to 16 percent of total detentions each year, as shown in Figure 12. Detentions by Arresting Agency. Detentions resulting from CBP arrests at or between ports of entry accounted for the majority of ERO detentions each year from calendar years 2015 through 2018 (ranging from 52 to 71 percent). Detentions resulting from CBP arrests also accounted for most of the variation in detentions from year to year, as shown in figure 13. Detentions resulting from ICE arrests varied little from 2015 to 2016, increased in 2017, and then varied little from 2017 to 2018. Detentions by Criminality. As shown in figure 14, the number of ERO detentions of non-criminals varied, but increased overall from calendar years 2015 to 2018. These detentions accounted for the majority of total ERO detentions each year (ranging from 53 to 64 percent). The variation in the number of detentions of non-criminals was partially due to fluctuations in detentions that resulted from CBP arrests. The number of ERO detentions of convicted criminals stayed relatively stable from 2015 to 2018, and accounted for the minority of total ERO detentions (ranging from 36 to 47 percent). The majority of these detentions resulted from ICE arrests (ranging from 64 to 76 percent) rather than CBP arrests. Removals The Number of Removals Varied, Increasing Overall. The number of ERO removals varied from calendar years 2015 through 2018, and increased 13 percent overall for the 4-year period (from 231,559 removals in 2015 to 261,523 removals in 2018). ERO removal data include removals resulting from both ICE and CBP arrests. During the two years PEP was in effect, the number of ERO removals varied little, increasing 6 percent from 2015 to 2016. Following issuance of the 2017 DHS memo, ERO removals decreased 12 percent in 2017, and increased 21 percent from 2017 to 2018. Removals by Gender. Removals of male aliens accounted for most of ERO removals (about 90 percent) each year from calendar years 2015 through 2018, as shown in figure 15. Removals by Country of Citizenship. In addition, from calendar years 2015 through 2018, ERO removals of citizens of Mexico, Guatemala, El Salvador, and Honduras collectively accounted for most of the removals each year (ranging from 90 to 94 percent). Citizens of all other countries collectively accounted for 6 to 10 percent of total removals each year, as shown in figure 16. Removals by Arresting Agency. Each year, removals resulting from CBP arrests at or between ports of entry accounted for the majority of total ERO removals (ranging from 60 to 74 percent). ERO removals resulting from CBP arrests also accounted for most of the variation in total removals from year to year, as shown in figure 17. Removals by Criminality. The number and proportion of ERO removals of non-criminals varied, but increased overall, from calendar years 2015 through 2018, as shown in figure 18. Specifically, removals of non- criminals increased from 40 percent of total removals in 2015 to 43 percent of total removals in 2018. Most removals of non-criminals resulted from CBP arrests (ranging from 80 to 95 percent), rather than ICE arrests. ERO removals of convicted criminals varied, increasing overall, from calendar years 2015 to 2018, and accounted for the majority of total ERO removals each year (ranging from 55 to 60 percent). Removals of convicted criminals resulted from CBP and ICE arrests at approximately equal levels. Appendix III: Enforcement and Removal Operations Arrests, Detentions, and Removals of Males, 2015-2018 This appendix presents the overall number of Enforcement and Removal Operations (ERO) administrative arrests (arrests), detentions, and removals of males from calendar years 2015 through 2018, including the number of arrests by criminality and the number of detentions and removal by criminality and arresting agency. We analyzed individual- level Immigration and Customs Enforcement (ICE) data to identify ERO arrests, detentions, and removals of males during calendar years 2015 through 2018. Arrests The Number of Arrests of Males Generally Increased. The number of ERO arrests of males varied from calendar years 2015 through 2018 but generally increased by 32 percent across the period, as shown in figure 19. During the two years the Priority Enforcement Program (PEP) was in effect, between calendar years 2015 and 2016, the number of ERO arrests remained stable, decreasing by about 5 percent in that period. The following year, after the issuance of the 2017 DHS memo in February 2017, ERO arrests increased by about 40 percent from calendar years 2016 to 2017, and decreased by less than 1 percent in calendar year 2018. Arrests of Males by Criminality. During the same time, the proportion of ERO arrests of convicted criminal males decreased each year from 90 percent of total arrests of males in calendar year 2015 to 69 percent in calendar year 2018, as shown in figure 19. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” Conversely, the proportion of ERO arrests of non-criminal males increased each year, from 10 percent of total arrests of males in calendar year 2015 to 31 percent of total arrests in calendar year 2018. According to officials, arrests of non-criminals include individuals who have been charged with but not convicted of a crime as well as those with no prior criminal history. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” According to ICE officials, administrative arrests of non-criminals include individuals who have been charged with but not convicted of a crime as well as those with no prior criminal history. According to ICE, ICE officers electronically request and retrieve criminal history information about an alien from the FBI’s National Crime Information Center database, which maintains a repository of federal and state criminal history information, and other sources. We used ICE’s determination of criminality for our analysis. Detentions Detentions of Males Increased Overall. The number of ERO detentions varied from calendar years 2015 through 2018, but increased overall by 32 percent over the period, as shown in figure 20. ERO detention data include detentions resulting from both ICE and U.S. Customs and Border Protection (CBP) arrests. During the two years PEP was in effect, the number of ERO detentions of males increased by more than 8 percent from calendar years 2015 to 2016. Following the issuance of the 2017 DHS memo, the number of male detentions decreased by more than 8 percent in calendar year 2017, and increased again in calendar year 2018, by over 32 percent. Detentions of Males by Arresting Agency. Detention of males resulted from both ICE and CBP arrests from calendar years 2015 through 2018, as shown in figure 20. For all the years in this period, except calendar year 2017, detentions resulting from a CBP arrest at or between ports of entry account for the majority of the detentions of males (ranging from about 58 to 63 percent). In calendar year 2017, detentions resulting from ICE arrests accounted for about 56 percent of all male detentions. Detentions of Males by Criminality. During the same time, the number and proportion of ERO detentions of convicted criminal males varied, ranging from 45 to 57 percent of all detentions of males, as shown in figure 21. The majority of these detentions resulted from ICE arrests, ranging from 66 to 77 percent of all convicted criminal male detentions. The number of ERO detentions of non-criminal males also varied, ranging from 43 to 55 percent of all detentions of males. Detentions of non- criminal males primarily resulted from CBP arrests, which ranged from 69 to 93 percent of detentions of non-criminal males between calendar years 2015 and 2018. Removals Removals of Males Increased Overall. The number of ERO removals of males varied from calendar years 2015 through 2018, but increased overall by 14 percent over the period, as shown in figure 22. ERO removal data include removals resulting from both ICE and CBP arrests. During PEP, which was in effect from calendar years 2015 and 2016, the number of ERO removals of males increased by about 6 percent. From calendar years 2016 to 2017, following the issuance of the 2017 DHS memo, the number of these removals decreased by more than 11 percent, then increased by more than 20 percent in calendar year 2018. Removals of Males by Arresting Agency. From calendar years 2015 to 2018, the majority of ERO removals of males resulted from CBP arrests at or in between ports of entry (ranging from 58 to 72 percent), as shown in figure 22. Removals of Males by Criminality. From calendar years 2015 through 2018, ERO removals of convicted criminal males accounted for the majority of removals each year, ranging from 58 to 63 percent of the total removal of males, as shown in figure 23. The removals of convicted criminal males were the result of both CBP and ICE arrests. For all the years in this period, except calendar year 2017, removals resulting from a CBP arrest account for the majority of the removals of convicted criminal males (ranging from about 52 to 56 percent). In calendar year 2017, removals resulting from ICE arrests accounted for about 56 percent of all removals of convicted criminal males. ERO removals of non-criminal males varied, increasing overall, from calendar years 2015 to 2018, and accounted for the minority of ERO removals of males each year (ranging from 37 to 42 percent). Most of the removals of non-criminal males were as a result of CBP arrests, ranging from 79 to 95 percent of all removals of non-criminal males. Appendix IV: Enforcement and Removal Operations Arrests, Detentions, and Removals of Females, 2015-2018 This appendix presents the overall number of Enforcement and Removal Operations (ERO) administrative arrests (arrests), detentions, and removals of females from calendar years 2015 through 2018, including the number of arrests by criminality and the number of detentions and removals by criminality and arresting agency. We analyzed individual- level Immigration and Customs Enforcement (ICE) data to identify ERO arrests, detentions, and removals of females during calendar years 2015 through 2018. Arrests The Number of Arrests of Females Generally Increased. The number of ERO arrests of females generally increased more than 70 percent from calendar years 2015 through 2018, as shown in figure 24. Between 2015 and 2016, the two years the Priority Enforcement Program (PEP) was in effect, the number of ERO arrests remained stable, decreasing by less than 1 percent in that period. Following the issuance of the 2017 DHS memo, ERO arrests increased by 65 percent from calendar years 2016 to 2017, and increased by less than 5 percent in calendar year 2018. Arrests of Females by Criminality. During the same time, the proportion of arrests of non-criminal females increased each year from 43 percent in calendar year 2015 to 63 percent of total arrests of females in calendar year 2018. For the purposes of this report and our presentation of ICE data, we refer to potentially removable aliens without criminal convictions known to ICE as “non-criminals” and aliens with criminal convictions known to ICE as “convicted criminals.” According to officials, arrests of non-criminals include individuals who have been charged with but not convicted of a crime as well as those with no prior criminal history. Conversely, the proportion of ERO arrests of convicted criminal females decreased each year from 57 percent in calendar year 2015 to 37 percent in calendar year 2018, as shown in figure 24. Detentions Detentions of Females Increased Overall. The number of ERO detentions varied from calendar years 2015 through 2018, and increased more than 45 percent over the period, as shown in figure 25. ERO detention data include detentions resulting from both ICE and U.S. Customs and Border Protection (CBP) arrests. During the two years PEP was in effect, the number of ERO detentions of females increased by more than 28 percent from calendar years 2015 through 2016. Following the issuance of the DHS memo, the number of detentions decreased by about 36 percent in 2017, then increased by over 77 percent in calendar year 2018. Detentions of Females by Arresting Agency. Detentions of females resulting from CBP arrests at or between ports of entry accounted for most of the detentions of females each year from calendar years 2015 through 2018 (ranging from 84 to 94 percent), as shown in figure 25. Detentions of Females by Criminality. As shown in figure 26, the number of ERO detentions of non-criminal females varied, but increased overall from calendar years 2015 to 2018. These detentions accounted for most of the total ERO detentions of females each year (ranging from 87 to 92 percent). Most of the detention of non-criminal females resulted from CBP arrests (ranging from 91 to 98 percent) rather than ICE arrests. The number of ERO detentions of convicted criminal females stayed relatively stable from calendar years 2015 through 2018, and accounted for the minority of total ERO detentions (ranging from 8 to 13 percent). CBP and ICE arrests accounted for approximately the same number of detentions of convicted criminal females. Removals Removals of Females Increased Overall. The number of ERO removals of females remained relatively stable from calendar years 2015 through 2018, but increased overall by 6 percent over the period, as shown in figure 27. ERO removal data include removals resulting from both ICE and CBP arrests. During the PEP, which lasted from calendar years 2015 and 2016, the number of ERO removals increased by more that 2 percent. From calendar years 2016 to 2017, following the issuance of the 2017 DHS memo, the number of ERO removals decreased by more than 14 percent, then increased by more than 20 percent in 2018. Removals of Females by Arresting Agency. Each calendar year, removals resulting from CBP arrests at or between ports of entry accounted for most of the ERO removals of females (ranging from 80 to 90 percent), as shown in figure 27. Removals of Females by Criminality. From calendar years 2015 through 2018, the majority of ERO removals were of non-criminal females (ranging from 66 to 72 percent), as shown in figure 28. Most removals of non-criminal females resulted from CBP arrests (ranging from 88 to 97 percent), rather than ICE arrests. ERO removals of convicted criminal females varied, increasing overall, from calendar years 2015 to 2018, and accounted for the minority of ERO removals of females each year (ranging from 28 to 34 percent). The majority removals of convicted criminal females also resulted from CBP arrests (ranging from 56 to 71 percent). Appendix V: Enforcement and Removal Operations Arrests of Juveniles by Age and Gender, 2015-2018 This appendix presents the overall number of Enforcement and Removal Operations (ERO) administrative arrests (arrests) of juveniles—persons encountered by ERO who have not reached 18 years of age—as well as the number of juvenile arrests by age and gender. We analyzed individual-level Immigration and Customs Enforcement (ICE) data to identify the number of ERO arrests of juveniles during calendar years 2015 through 2018. The Number of Arrests of Juveniles Increased Overall. The number of ERO arrests of juveniles increased overall by 53 percent from calendar years 2015 through 2018, as shown in figure 29. During the two years the Priority Enforcement Program was in effect, ERO arrests of juveniles increased 47 percent (from 887 arrests in 2015 to 1,307 arrests in 2016). Following issuance of the 2017 DHS memo, ERO arrests of juveniles increased 76 percent in calendar year 2017 (2,294 arrests), and decreased 41 percent in calendar year 2018 (1,361 arrests). Arrests of Juveniles by Age. The proportion of arrests for juveniles of all age groups—ages 0 to 6, 7 to 12, and 13 to 17—varied between calendar years 2015 and 2018, as shown in figure 30. For instance, the proportion of arrests of juveniles ages 0 to 6 between calendar years 2015 and 2018, ranged from 31 to 43 percent of the total number of arrests of juveniles. The proportion of arrests of juveniles ages 7 to 12 ranged from 16 percent to 23 percent of total arrests of juveniles during this same period while arrests of juveniles ages 13 to 17, during the same period ranged from 34 percent to 50 percent of total arrests of juveniles. Arrests of Juveniles by Gender. Each calendar year from 2015 through 2018, arrests of male juveniles accounted for the majority of ERO arrests of juveniles (ranging from 57 to 66 percent), as shown in figure 31. Appendix VI: Enforcement and Removal Operations Administrative Arrests by Country of Citizenship This appendix presents the number of U.S. Immigration and Customs Enforcement (ICE) Enforcement and Removal Operations (ERO) administrative arrests by country of citizenship for calendar years 2015 through 2018. Each year from 2015 through 2018, ERO administratively arrested aliens from over 200 countries. Appendix VII: Enforcement and Removal Operations Detentions by Country of Citizenship This appendix presents the number of U.S. Immigration and Customs Enforcement (ICE) Enforcement and Removal Operations (ERO) detentions by country of citizenship for calendar years 2015 through 2018. Each year from 2015 through 2018, ERO detained aliens from over 200 countries. Appendix VIII: Enforcement and Removal Operations Removals by Country of Citizenship This appendix presents the number of U.S. Immigration and Customs Enforcement (ICE) Enforcement and Removal Operations (ERO) removals by country of citizenship for calendar years 2015 through 2018. Each year from 2015 through 2018, ERO removed aliens from almost 200 countries. Appendix IX: Review of Available Criminal Charges for Detentions of Selected Populations Resulting from ICE Arrests This appendix presents the number and type of criminal charges of U.S. Immigration and Customs Enforcement (ICE) Enforcement and Removal Operations (ERO) detentions of selected populations (aliens who are: transgender, individuals with disabilities, pregnant, individuals with mental disorders, women who are nursing, or individuals who are elderly) resulting from ICE arrests. ICE administrative arrests of aliens for civil violations of U.S. immigration laws include arrests of both aliens with prior criminal convictions and those without prior criminal convictions. According to ICE, ICE officers electronically request and retrieve criminal history information about an alien from the FBI’s National Crime Information Center (NCIC) database, which maintains a repository of federal and state criminal history information. ICE officers are also able to manually enter criminal history information in ICE’s data system if they discover additional criminal history information that was not available in NCIC. ICE officers may also check for criminal convictions committed outside the United States, on a case by case basis. To identify which convictions or charges were immigration-related for these selected populations, we reviewed the criminal history information recorded in ICE’s data system by ICE officers. m ICE collected data to identify each of these populations beginning at different timeframes or subsets within the population, as shown below. For information on the number of detentions of selected populations resulting from ICE arrests by criminal charge type, see tables 13 through 18. Appendix X: Length of Detentions of Selected Populations This appendix presents the length of U.S. Immigrations and Customs Enforcement (ICE) Enforcement and Removal Operations detentions of selected populations—aliens who are: transgender, individuals with disabilities, pregnant, individuals with mental disorders, women who are nursing, or individuals who are elderly. Available ICE data varied for each of these populations because ICE began collecting these data at different time periods. In addition, the length of some detentions from a particular year may be undetermined because they were still ongoing at the time of our review (as of May 15, 2019). We present available data for each of the populations. Detentions of Transgender Individuals. Based on available records each year from 2016 through 2018, the majority of detentions of transgender individuals were 90 days or less (ranging from 62 to 70 percent), as shown in table 19. Detentions of Individuals with Disabilities. Based on available records in calendar years 2017 and 2018, the majority of detentions of individuals with disabilities were 90 days or less (56 and 65 percent, respectively), as shown in table 20. Detentions of Pregnant Women. From calendar years 2016 through 2018, the majority of detentions of pregnant women were 15 days or less (ranging from 71 to 93 percent), as shown in table 21. Detentions of Individuals with Mental Disorders at ICE Health Service Corps-staffed facilities. Based on available records each year from calendar years 2015 through 2018, the majority of detentions of individuals with mental disorders at ICE Health Service Corps (IHSC)- staffed facilities were 90 days or less (ranging from 59 to 71 percent), as shown in table 22. Detentions of Nursing Women at IHSC-staffed facilities. From calendar years 2015 through 2018, most detentions of nursing women at IHSC-staffed facilities were 30 days or less (ranging from 77 to 97 percent), as shown in table 23. Detentions of Elderly Individuals. Based on available records each year from calendar years 2015 through 2018, most of the detentions of elderly individuals were 90 days or less (ranging from 80 to 84 percent), with the majority being of 30 days or less, as shown in table 24. Appendix XI: Comments from the Department of Homeland Security Appendix XII: GAO Contact and Staff Acknowledgments GAO Contact Staff Acknowledgments In addition to the contact name above, Meg Ullengren (Assistant Director), Carissa Bryant (Analyst-in-Charge), Hiwotte Amare, Michele Fejfar, Eric Hauswirth, Dainia Lawes, Marycella Mierez, Heidi Nielson, and Claire Peachey made key contributions to this report.