CBS

Season 1: Episode 16 - Little Fish

Little Fish: Ralph and Jack bust Frank Olmstead for engaging in sexual acts with a minor, Patricia, in a seedy local motel. After hearing about an underage prostitution ring for months, Lamb hopes to get information about it from both of them. However, FBI Agent Patrick Byrne derails his plan, since Byrne knows Olmstead works at the Savoy count room and could provide crucial information in a case against Savino. In exchange for that information, however, Lamb would not be allowed to press charges against Olmstead, and he gets very upset about that. He decides to hold Patricia at the station for 48 hours, both for her own safety and to see if he can draw any information out of her, but she's smart and tight-lipped. Both Lamb and Agent Byrne's plans are derailed, however, when Savino and Mia devise a scheme to get Patricia released from custody. However, Patricia later sends Lamb a personal letter, thanking him for his kindness and telling him where to find her pimp and arrest him.