Oak explains that Calvess shot at the dealers as they fled from Oak, leaving the shoulder wound. Oak argued with him, explaining that he had had enough of defending Calvess and would turn him in to the department. In despair, Calvess took his gun and shot himself. Oak had been protecting his name and family, so Calvess' wife could receive his pension. Oak's motive was to convict the dealers who he felt made Mike a junkie. Oak dies in Tellis' arms, leaving the confession on tape, and Tellis with only moments to decide what to do with it.