S4·E4 Users

Jamie goes undercover and befriends a fifteen-year-old snitch after he witnesses a murder. But a rogue Narc is controlling the kid, and is ultimately to blame for his death as well as two dealers.

Monica Harper's sexual involvement with Commander McKinnon escalates. As their on-again, off-again relationship progresses, Bobby Cruz discovers his abusive nature and helps Monica trap McKinnon into backing off.