The link in the original post doesn't mention the fact that Baldwin and the armorer will be charged.

https://www.cnn.com/2023/01/19/entertainment/rust-movie-shooting-alec-baldwin-charges-decision/index.html

"Actor Alec Baldwin, who fatally shot a cinematographer on the set of the Western movie “Rust” in 2021, and the film’s armorer, Hannah Gutierrez Reed, will each be charged with two counts of involuntary manslaughter, prosecutors said Thursday."

I'm not gonna pretend to know the ins & outs of the movie industry regarding weapons. But I think the meat of this case will be the responsibilities and processes that an armorer in the industry is supposed to follow.

Do they test the gun before handing it to the actor? Is there a double checking process? What instructions are given to the actor when they're handed a weapon?