S12, E4: When a 15-year-old girl is hit by a car and killed, Detectives Benson (Mariska Hargitay) and Stabler (Christopher Meloni) are surprised when Dr. Melinda Warner (Tamara Tunie) rules it a homicide. She has found signs that the girl was being starved, and had even recently given birth. As the two look into the case with the help of Detective Odafin Tutuola (Ice-T) and Dr. George Huang (B.D. Wong), they find that the girl had fallen victim to a human trafficking ring, and though some think its a case for the FBI, the cops instead reach out to Assistant U.S. Attorney and friend Christine Danielson (guest star Gloria Reuben), who has moved up in the world since the detectives last saw her. Meanwhile, Captain Donald Cragen (Dann Florek) is frustrated by his crumbling precinct. Also starring: Richard Belzer (Detective John Munch).