investigators are concerned. she is cooperating, but the sooner the better that she comes in, we can clarify some of these questions. reporter: the other individual that is the focus of the investigation is the assistant director, dave halls. we re waiting to hear from him as well as additional information from alec baldwin, the actor himself. we know that the sheriff here has said that thus far all the witnesses have been cooperative, but they have additional questions as they try to answer that key question, how did a live round of ammunition make its way on the set into that firearm that ultimately took the life of the cinematographer. kate? halyna hutchins. thank you so much, josh. i really appreciate it. joining me right now is richard howell, a film armorer with 30 years experience, and cnn senior legal analyst alan hoenig. richard, your reaction to what we re hearing from the armorer through her attorney, saying that she had no idea where the live ammunition came from. when