re: Need advice on handling workplace violence/threat/harassment.

Unfortunately for you, the fix is in. He has favor with the right people and they see you as the problem. If this was going to be resolved internally there would be signs already and since its not happening, it's apparent that they believe you need to go.

I worked for international paper for 14 years and saw this many times throughout multiple departments. It is corporate logic at work when the fix is in. Right now, he is deciding how to set you up to take the fall for some issue and fired or reprimanded so badly that you quit.

It's not right but this is how they do things at that leveland there isn't much you can do about it.

If I were you, I'd be looking quietly for another job. I know it sucks because he's in the wrong and you want to fight for what's yours but it's also obvious that the powers that be have no intention of removing him and see you and other employees as the problem. When you are gone, so are their problems.

Good luck to you but unless this guy screws up big time they are going to cold shoulder you and falsely accuse you until you leave.