this morning, there are new details about the events on the set of the movie "rust" just hours before actor alec baldwin ended up with a gun that fatally shot the film's cinematographer and wounded the director. we're also learning the assistant director was fired in 2019 after a gun safety incident on another movie set. cnn's lucy kafanov is live from the set. >> reporter: good morning. a lot of developments coming in here. we know authorities are combing through the evidence. there's no charges that have been filed. this is very much an active investigation. but new details now emerging, both about disturbing lapses or concerns with gun safety measures and the assistant director on previous productions. the producers of "rust" say they're conducting an internal investigation of security measures. production of the movie "rust"