Try them as adults. Lock them up in protective solitary confinement. For. The. Rest. Of. Their. Lives.
....”It’s time to put to rest the kid glove treatment of these animals, regardless their age”.....
We use to have ‘clicks’ in schools....generally one or two groups would step out of line by fighting or vandelizing now and then.......But now they’re violent and destructive “gangs” . That’s what they do.