Alec Baldwin to be charged with manslaughter in shooting

Alec Baldwin and one of his crew members are getting charged for the shooting on his set of Rust.  I am surprised he received manslaughter charges for this incident.  I thought only the armorer was going to get some charges.  Both of them are receiving charges.  Knowing the police were looking into them, both Hannah Gutierrez-Reed and Baldwin haven’t kept their mouths shut.