Trivia: There is not a single speaking role for a woman in the entire film.
Trivia: The book that this movie is based on is a fake. The author Thomas E Gaddis admitted he never met Stroud until 1962 in a courthouse in Kansas City for 30 seconds. His story came from his mother, ex-cons who knew him or he just made them up. Stroud was never allowed to see the film.