It’s not that easy. We’ve tried for years to get our 2 adopted foster kids into an institution. Our boy acted similarly to this kid but never any weapons, but multiple threats of violence and our daughter was the biggest thief in school. Both had a team of behavioral counselors and psychiatrists.
The bottom line is the kids have to actually cause bodily harm to themselves or others and even then you’re lucky if tgey have a facility that has an available bed.
Not being easy is the point.
IIRC, they have made it extremely hard to get anyone required mental help. Liberals like to empty prisons and mental institutions and set the inmates free on the general population.
When they could be getting help.