He was dumped on his parents.
Let's see. The kid was removed outside because he was continually disruptive and the resource officer had to pepper spray him because he was threatening the officer. A little more than a 'fart blower'.
It sounds like your concept of arrest doesn't match up with the description from the story. "Arrest" doesn't mean taken to the local jail. If the kid is taken to the principal's office and held there until his mother arrives to pick him up, he is "under arrest".
Looks like I directed my reply to you by mistake. It should have been directed to another comment.