Law & Order: Special Victims Unit: Season 3, Episode 18

Guilt

ADA Cabot faces a reluctant witness (Bret Harrison) in a case of child molestation. She goes far beyond the line of duty to find evidence against the abuser (Beau Gravitte). She even sends detectives Benson and Stabler to illegally search the boy's home and almost ruins the case and all of their careers.