you people seem to be missing a lot of thing — mainly, what do YOU do with a brat on a rampage in a school full of toddlers — and you know damned well tht if you lay a finger on the little angel, his parents will sue you butt off????
Release him to his parent.
If you feel there is an issue that would require a medical or psych evaluation, then follow the proper legal procedures to do so against the parent’s wishes.