I agree with you that he wasn’t in charge of everything, likely not in the case of hiring, but he was a producer which gave him authority over the set and most people there. That brings up questions such as did he participate in the after hours shooting range, was he the cause for poor safety standards on the set, did he instruct the armorer or try to cut corners? All of this could lead to him being negligent in providing a safe work environment for the crew. None of it do we truly know at this point, maybe the DA does, but it should all come out in a trial. If he was the cause of the poor safety conditions then he is absolutely liable for the death beyond having just pulled the trigger. That wouldn’t be surprising since we all know he can be a major asshole. It’s not absurd for him as a producer and the one holding the gun to be charged. Let’s see what information turns out to be true when the trial starts.