The kid wasn't even punished here! And if he didn't know before that he should have reported it, he does now, through the 'lesson' he signed. There is no 'unfair shake' being presented. The parent here should just sign the note.
I disagree, mostly because the parent does not really know the purpose of the paper the child signed.
I think the parent needs to sit down with the officials and find out the intent. It's one thing if the purpose was to make sure the child understood the rules.
My concern is if the school thought this was a big enough issue to involve the police and child services- then the parents of all children involved, even as witnesses should have been made aware of and allowed to attend any questioning, or signing of any statements. With all the BS rules and laws now, parents have to be careful- some of these things can really get wild.