Dave Halls, the first assistant director who was in command of safety on the set, took a plea deal after he was charged with negligent dealing with of a weapon, avoiding jail time. Before Mr. Haag tested the gun, it had been examined by the F.B.I., which broke elements of it throughout testing, a complication that is sure to be raised by Mr. Baldwin’s protection. In order to test the gun, Mr. Haag changed the broken elements with new ones from the same sort of gun. Mr. Baldwin was rehearsing on a New Mexico film set with a gun that …