Third Strike - S1.E17

A burglar that Mike once put in jail fears a third strike conviction if he reports that he witnessed a murder as he lay in wait to rob an office, and he goes to Mike for help in convincing the police that the wrong man has been arrested for the crime. The detective on the case has a long-standing grudge against Mike, so he does an end run around her by enlisting Marcellus's help. When they discover that the perp is an undercover cop, they are forced to devise a plan to trap him into confessing.