We don't need 17 year olds policing. That's for trained people. Did he reside there? If not he had no business pulling a Barney Fife patrol.
But the trained people have been ordered to stand down. ANd if not, even if the local mayor forgot to give that order, do the cops dare to do anything, for fear they will be arrested for doing their job?
He has every business, and reason and right to do what he did.