Law & Order: Criminal Intent: Season 5, Episode 2

5 - 2: Diamond Dogs

Detective Logan gets his first Major Case and partners with Detective Barek to probe a series of murderous Mom-and-Pop jewelry heists. However, as Logan zeroes in on a drug-addicted young loser Johnny as his suspect, his instinctive methods cause concern among his fellow law enforcement officers. When the detectives arrest a twitchy female accomplice, they pick up the scent of an older woman who not only is a career criminal, but could be the driving psychological force behind the crimes.