S11·E89 Whipping Boy

Keane confronts some youths fighting in an underpass, but they all claim that they were play-fighting and have committed no crime. The next morning Loxton and Hollis are called to the scene of a suspicious death, and discover that the deceased is one of the youths from the night before. Lines discovers that a school bully he investigated some years before is still up to his old tricks, and wonders if he has now committed murder.