Manslaughter is a very widely interpreted charge depending on the jurisdiction. Basically, what the DA is doing, is charging the armorer and Baldwin both and letting the jury decide which applies to which.
It could have been worse for the armorer, and I'm surprised it wasn't. I figured she'd get criminally negligent homicide, but she didn't. She should count her blessings.
I think what really doomed Balwin was, once again, his loud mouth. He blamed everybody but himself. Literally. Over and over again every chance he got.
What's more, he wouldn't shut up about how he was playing with the gun but never pulled the trigger.
If he'd kept his mouth shut (an impossibility for him, to be sure) he would have probably walked.
What the prosecution is going to contend is that in both their cases, the behavior they took part in caused the death of the Hutchins. Let's face it, they're not wrong. Pointing a gun at someone and pulling the trigger is somewhat risky behavior, especially given that there was no live shoot going on at the time.
What's more, Baldwin is an executive producer on that set. It was he who was also responsible for making sure people were doing their jobs. Clearly, he wasn't.
I think the prosecution is going to show a very lax, very unprofessional, very half-assed production of sloppiness led to Hutchin's death and that Baldwin and the armorer are the leading causes of that.
We'll see if they have a case, but just based on the bullshit I've heard come out of Baldwin's mouth alone, I'm pretty sure they do.