He was obviously negligent as he didn't check the weapon as all shooters in that situation should, but I think it's likely that he'll skate on any charges.
I think he's looking at a huge civil lawsuit.
It's worse than that. She worked one prior job, and people complained that she was unsafe.
The AD likewise has a history of unsafe behavior.
Yet baldwin still hired them.
He's fucked. His progressive privilige might shield him from criminal charges, but he is going to be destitute by the time the civil lawsuits are over.