The Dark Side - S5.E23

When a visiting detective is accused of murdering a petty criminal and drug user, Maggie and PJ find their relationship under great pressure. The dead man was a vital link in the case involving three missing police guns and the discovery of Det. Sgt. Ben Stewart crouching over his body leads to suspicion that he is the murderer. Stewart has made no secret of his feelings for Maggie and he turns to her for help. While Maggie believes in Stewart's innocence, PJ can only go on the evidence.