Need advice concerning a young adult who is harming himself...

[MineralMan]

13. I understand. Your daughter is apparently aware of his self harm

stuff, since you mentioned that she notified someone at the school some time ago. That would seem to indicate a non-emergency situation. That could be incorrect, but probably is not. If so, there are many options other than calling 911. Some police departments are good at handling stuff like this, and some are terrible at it. They're in the business of dealing with emergencies. Having the police or paramedics show up may not be the right solution and could make matters worse in his household.

I hope you find a way to help this young man. It can be a very difficult process, and he'll have to want it.

I'm an old crisis hotline phone counselor, and this is not an uncommon situation. It may take several tries before the person actually seeks help. It's a very difficult thing.

Edit to add: Give your daughter a big warm hug, too. Her heart really seems to be in the right place.