You know that's ... illegal right?
You could shoot him.
What would Ueshiba have done?
Don't forget to bury the body.
Wow I missed that.
Ya this is beyond a disruptive student. It sounds like you're trying to use a bandaid on someone who had an arm cut off.
You need to stop goofing around, get serious, get this ass banned from where you teach (read involve the police)