racketeer: someone who commits crimes for profit (especially one who obtains money by fraud or extortion)
principal: (criminal law) any person involved in a criminal offense, regardless of whether the person profits from such involvement
tee hinge: a hinge that looks like the letter T when it is opened; similar to a strap hinge except that one strap has been replaced by half of a butt hinge that can be mortised flush into the stationary frame