From the VERY limited amount of information currently available ……..
It appears there was a mountain of negligence involved, however, it doesn’t sound, AT THIS POINT, that it will be criminal. There’s going to be a huge civil suit, probably an insurance settlement, maybe some litigation, maybe not. At this point this looks like an accident.
As much as I dislike Baldwin, at this time it doesn’t appear that he acted with malice or even knowledge that his actions would be dangerous.
Actors point guns at people all of the time. Sometimes they even fire those guns at people. The actors trust the people around them (prop masters and others) to keep the set safe.
People go to great lengths to ensure safety but sometimes there are failures. Stunt men are injured, sometimes fatally. Actors are injured, sometimes fatally. Crew members are injured, sometimes fatally. I don’t think anyone on that set wanted to kill the director of photography and she certainly didn’t want to die. Everything points to an accident – WITH THE INFORMATION CURRENTLY AVAILABLE.