Teacher most likely did the right thing. Kid is disrupting the learning environment for all, if can't be quickly dealt with, remove them.
Admin's dropped the ball. Grabbing the kids wrists to restrain them. Big mistake, with kids like this that escalates it, so then what? You can't escalate further and smack the kid or anything else. Having the kid arrested was wrong, suspended, call parents, whatever, sure, but arrested?
