Law & Order: Special Victims Unit S15E17 - Gambler's Fallacy

Detective Amanda Rollins' addiction drives her to an illegal gambling club, where waitress Clare Wilson recognizes her as a cop. To protect her job, Rollins strikes a deal with the club managers to make their illegal transgressions disappear. But when the debt isn't paid to their liking, she doubles down and loses, forcing Sergeant Benson and Detective Tutuola to suspect one of their own of an unthinkable crime.