I agree. The person responsible is the person who hired the safety team and the gun team, who manages the entire production, and who has the authority to say "STOP" in an unsafe situation. Given his role as co-producer, Alec Baldwin IS that person.
Hollywood has long figured out how to shoot the "shot down the gun barrel" scene. They use a mirror so the gun isn't actually firing at equipment or people. They are far away using a telephoto lens. There are shields up for the humans. None of this is new.
If this was a rehearsal and Alec had a live firing weapon on set, that is a problem. That he cocked and discharged it at people is a BIG PROBLEM. The armorer shares a lot of the responsibility but it ultimately falls on Alec, if only he had learned the Eddie the Eagle lessons from the NRA as a kid...
Now it's possible that everything went according to plan except there was some shrapnel or spalling that just somehow hit Ms. Hutchins in a fatal way (kind of like a freak accident when someone dies from a BB). But I suspect Alec was being negligent and unsafe. Either in the team he helped hire or by not saying "STOP" when the situation became unsafe prior to pulling the trigger on a live weapon (loaded or unloaded) with people around.
