Law & Order: Special Victims Unit: Season 4, Episode 11

Damaged

When a six-year-old girl who was critically injured in an apparent robbery gone bad later dies and tests positive for a sexually transmitted disease, detectives investigate the family, the store clerk, and the son of a prominent attorney (Michael Gaston) who had appeared to foil the crime. After evidence turns up that the little girl's older sister (Ari Graynor) was dating the alleged sexual predator, ADA Cabot attempts to eradicate the deal that had been made with the older sister for her testimony.