Law & Order: Special Victims Unit: Season 1, Episode 21

Nocturne

After a pharmacy turns over some disturbing photos of a young boy, Benson and Stabler arrest a piano teacher for child molestation. After the boy claims to have seen other pictures of young boys at the teacher's house, the detectives get a warrant and discover a series of videos that document the life of a young boy named Evan. Believing he can make or break their case, the team searches for him, only to realize that his testimony may not help at all because Evan is scarred far more deeply than they realized.