John Carlen was born on 13 October 1945 in Dallas, Texas, USA. He was a writer, known for Dark Justice (1991), Sonny (2002) and Lethal Vows (1999). He died on 10 December 2009 in San Diego, California, USA.
Started in the film industry as an advisor. He worked with both Dustin Hoffman and Harry Dean Stanton on their portrayals as bank robbers. His screenplay for Sonny (2002), directed by Nicolas Cage, was loosely based on his own life.