Knowing You - S15.E77

Daly leads a raid on the home of a violent pimp who has been recruiting teenage girls. However, the prime suspect vanishes after attacking Proctor during the raid, with Holmes distracted by a car driven by Rita Davis almost hitting her, Davis a prison inmate with Holmes when she went undercover at a woman's jail (Follow Through). Davis tracks Holmes and asks for help; the pimp has been trying to recruit her 14-year-old daughter, but the info she provides for two potential leads go nowhere. Events take a sinister turn when one of the girls rescued from the brothel is subjected to an acid attack, while Daly's informant turns up dead. When Davis and her pimp report that their suspect has abducted Davis' daughter, Holmes gets personally involved, however Proctor threatens to undermine her efforts.