Clark and the team are called to investigate the shooting of a cop. It seems that Arroyo and Owen know the man. It seems like he was moonlighting as a body guard to a rapper. So they think that another whom he's having a feud with might be the one till they learn that the feud was staged. So Clark and Owen talk to the cop's wife and learn that he may have been dirty which doesn't surprise Owen. It seems that when he knew him, he and a couple of other cops were not exactly doing things that were right. And they think that another cop might be the one who killed him but Arroyo who idolizes him doesn't believe it.