 While working on the script, writers William Faulkner (I) (qv) and  Leigh Brackett (qv) couldnt figure out from the novel who  murdered a particular character. So they phoned  Raymond Chandler (qv), who angrily told them the answer was right  there in the book. They shrugged and returned to their work.  Chandler soon phoned to say that he looked at the book himself and  couldnt figure out who killed the character, so he left it up to  them to decide. In the original cut, shown to the armed services,  this question is resolved; in the film as released, it isnt.