 Bret Roberts who plays the Nightstalker was also cast early.  Director Chris Fisher met him in 2000 at the Sundance Film Festival.  He was passed out on Chriss couch in the middle of the afternoon.  Chris didnt know who he was, so he shook him and asked. The two  ended up becoming good friends. And Chris cast Bret because of his  resemblance to Richard Ramirez. Whos story the film is based on.