S6, E5: Construction workers discover a teenage girl, Tandi McCain (Amanda Seyfried), who's been missing for days, bound with duct tape and very scared. She was apparently raped, but when her stepfather, Ronald (Michael O'Keefe), arrives, they fight to prevent her from going to the hospital. Benson (Mariska Hargitay) convinces them they have no choice in the situation. Tandi had definitely been raped, and claims she was on the Hudson University campus, when four cadets kidnapped her and took her. She is a little sketchy with the descriptions, but the detectives are able to identify four cadets who all have the same story - Tandi had been at a dorm party, drinking and having a good time. They all claim innocence, and continue to stick by the fact none of them touched her.