Law & Order: Special Victims Unit: Season 9, Episode 15

Undercover

After a young girl (Shareeka Epps) is found raped in a community garden, Benson and Stabler realize the girl has a mother who is in a female correction facility. After the rape kit on the girl goes missing, the detectives realize one of the corrections officers at the facility is raping and brutalizing women. Without the rape kit, however, Benson and Stabler have no proof, so Benson goes in undercover at the same facility to catch the officer, but is almost raped herself in the basement of the facility.