Dream Deceivers: The Story Behind James Vance vs. Judas Priest (1992)

From the PBS web site:

Just before Christmas, 1985, 19-year-old James Vance watched his best friend Ray Belknap shoot himself to death with a .12 gauge shotgun in a churchyard outside Reno, Nevada. Then Vance pulled the trigger on himself. He survived but was severely disfigured. Vance later claimed his actions had been influenced by the heavy metal music of Judas Priest, prompting his family to sue the band. The drama of the ensuing trial provides the framework for David Van Taylor's disturbing look at teenagers today.