Were the circumstances not so horrid, it could have been a spin-off from the Spinal Tap movie - the Birmingham heavy metal band Judas Priest, their sober off-duty clothes contrasting with their demonic stage gear, in a Nevada courtroom politely explaining their music. Those circumstances were that, in a Reno churchyard in 1985, two American teenagers carried out a shotgun suicide pact, allegedly urged on by hidden messages in the group's music. Ray Belknap died instantly, his friend James Vance survived but with his face blasted away. The grim picture that emerges from the interviews with those involved, including Vance, and the surreal court proceedings, reveals more about empty lives in middle America than it does about the pantomime art of Rob Halford, Judas Priest's singer.