I'm sorry your son was let out before his psychosis let up. I think many patients are let go too early, and yet I wouldn't want the total opposite, either.

I'd keep a very close watch on your son. If he seems like a violent threat to anyone, call the police asap. It's ashame it has to get to that point, though.

Am I right to assume he isn't taking medications now that he's home? If not, maybe a depo medication shot would be a good option to consider if it gets to the point where he can be given one.

That's terrible that he was left to the point of causing such extensive damage at the hospital. They should have isolated him and/or given him a shot, if they didn't. Once I was also followed by the ward security because of violence risk.

I know I've not given you much of the advice you were likely seeking. I'm sorry. Just be sure you communicate this whole history loud and clear to a psychiatrist.