So what type of punishment does Alec deserve for this death? Well, I'm not sure.
Early on I read a report that Alec had been in screaming at the director and this lady an hour or two before this incident. I can't find any mention of that now, so I don't know if it is true, but if it is, I think that changes his culpability a little. If you have ever had a gun pointed at you that you think is real, even if unloaded, you understand that is a stressful thing to have done to you. Was Alec ****ed off? Did he pull the gun, point it at these two, and pull the trigger as kind of an FU to get a rise out of them? Maybe, and if true, the penalty should be appropriate for that level of negligence and malice. Jail time? I don't think so, because I don't think he is enough of a whacko to murder someone and I think he thought the gun was safe, but something more than a wrist slap should happen.
Alec is a hot head, no one can deny that. He has been in many films with guns, and I find it hard to believe that he hasn't been trained, repeatedly, on safety procedures and concerns regarding gun safety and protocol on a set like this. I believe he knew better than to accept that gun being safe on the word of the Asst Director with out checking it himself. I can't figure out why he didn't check it, other than maybe he didn't intend to pull the trigger so he thought it didn't matter. Big mistake if true. Always treat a gun as loaded, even a gun used as a prop on a movie set. I think at a minimum Alec should be charged with involuntary manslaughter or what ever is the least charge for something like this and a jury should decide his guilt.
Will something like this happen? I doubt it, being elite has it's privilege.