Law & Order: Special Victims Unit S07E06 - Raw

Detectives Benson and Stabler investigate a school shooting, where three children are shot. When one African-American child dies, detectives follow critical clues and are lead to believe the crime was racially motivated. As the case progresses, Detectives find evidence that the rifle used in the killings is linked to a gun store, which also serves as the headquarters for a white supremacist group: Revolution Aryan Warriers. Detectives discover that Star Morrison, and the store owner's 14-year-old son Kyle both keep Nazi paraphernalia in the basement of the shop. DNA from the rifle leads detectives to the person they believe is the killer and when the case goes to court shots are fired inside the court house by group members and a major twist is revealed.