Has anyone ever saw this rare classic? It is currently only available on VHS and Laser Disc (officially), but it well worth digging up if you ever get the chance.
Fire-and-brimstone preacher sees Satan everywhere, trains gullible young boy to "detect" evil, and the two of them commit several murders in the name of Jesus. Based on a true story.
http://www.imdb.com/title/tt0094671/