weapons expert not on the set of rust says when strict guidelines are followed, accidents shouldn t happen. blanks can kill. treat all firearms as if loaded and live ammunition shouldn t be used and nobody should be issued a firearm until he or she is trained. it s unclear if hutchens was killed by a blank, live round or other projectile. the way we handle firearms and the blank ammunition onset seems very difficult to imagine how a blank would do that. reporter: in 1993 after brandon lee the son of bruce lee was killed in a filming accident involving a prop gun, industry safety measures tightened. to my mind, this accident happens because somebody missed some check that they should have done. reporter: hutchins who is 42 and posted photos of horseback riding near the set was quickly becoming a hollywood star.