I doubt he can walk away from the financial impact of this. I don't see how he can avoid civil liability. Insurance is definitely something to watch, if their insurance coverage says they don't owe money because of the management of the set, it's probably a good indication this will get messy across the board.
This. If anyone is held accountable it will be whoever told him it was a "cold" gun. But he certainly bears some responsibility along with anyone else in the chain of custody (and him again because he's the producer). We all know/feel he should have checked it himself since he was the final person in the chain of custody. In the liberal mind it's the gun's fault. No gun = no death, so he won't be held accountable. I doubt even a New Mexico prosecutor would file charges against him. Unfortunately, he's so arrogant I believe he'll just blame someone else for it and just move on with his life. The insurance will cover a settlement and it won't cost AB anything - not even his conscience.