S4·E3 Boys' Club
Aired May 5, 2004
Synopsis
The squad is called in to investigate the death of Detective Sergeant John Van Impe, and are soon faced with two suspects -- the officer's younger partner, Wayne Tocchet, and a long-time informant who fled the scene, Marlon Cummins. As the investigation continues, the squad begins to realise that they may have to arrest one of their own.