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Jimmy is called out when a homeless man is found murdered behind Reverend Novotny's church but is suddenly stricken with terrible pains at the scene. Dr Joey discovers he has a potentially cancerous growth on his liver and she takes samples from it, telling him they'll know for sure by the end of the day. He pushes on with the murder investigation to take his mind off it. The victim is identified as a former army veteran and a boy named Jack Klausner, known to Kenny through the basketball team, comes forward as a witness and describes the two men he says were the killers. When his statement is found to be a lie, Jimmy interviews both Jack's mom and his retarded brother, Billy, who tells him that Jack wasn't home the night of the murder, and it emerges he was present when two of his friends killed the man with a brick. He flips out, taking Jimmy hostage at gunpoint, but Kenny brings Billy to the station and he talks him out. The case wrapped up, Jimmy learns he's okay and his growth is benign but, touched by his own mortality, he goes to the military funeral of the murder victim.