Baldwin was ONE of the directors, and in charge of making the area safe by that virtue. It was reported that this was NOT the first firearm incident on that set. That would tend to lead to a negligent homicide. The one that provided the "cleared" weapon to him should also be considered for this as well.
And you are right, if it was Alec's brother, I would have felt bad for him. Do you think Alec Baldwin would be calling for mercy if someone else had done it? Imagine if the Trumpster accidentally pulled the trigger. I bet he would have been fired.
The story isn't complete. We don't have all the facts, and the media by and large cannot be trusted to provide all of the facts OR even get to the bottom of all of this. However, ONLY the jury that should be setup would be in a position to make that decision.
This lesson that this does point out and reinforce is that one second of carelessness or complacence can be distastrous. One person hurt, One Person dead, A son without a mother, a husband without a wife, and I presume parents without a child and siblings without a sister, etc. And a man, no matter what a piece he is, no matter whether he is criminally or personally held responsibile, jail time or all of his wealth, etc. he will have to live with the fact that he has taken someone else's life. Sadness as with any of these types of stories.
Some might find Jon Schneider's commentary interesting.