"The guy who gets away with it."
From the movie L.A. Confidental (1997).
Edward Eaxley (played by Guy Pearce), a young detective, is explaining why he became a cop. His father, a well-known policeman, was killed by an unknown assailant. Eaxley decided to become a policeman to exact revenge on all those who thought that they could "get away with it". Rollo Tomasi was simply the name that Eaxley gave the faceless criminal to help bring his antagonist to life.