So he incentivized them to do it again. He should press charges.
Their parents took them back and paid the bill.
If their parents are like mine were there is plenty of disincentive to never do it again.
Should have received the full amount plus $100 each in-kind labor, picking up trash, etc in return for not pressing charges. Little snots .
He should had them work the other half off by cleaning the bathroom, floor and windows.