The cop should not have been there in the first place.
I work in a school. Without order, there is complete chaos.
We teachers, in my district, have the legal right to move student physically from point A to point B if the student refuses to move after clearly being told. Thank God it doesn’t happen very often, but I did have to physically toss a kid out of my room once and into some bushes (viciously fighting another smaller, weaker student - I was younger then and wouldn’t do it today)
From what I’ve read, this student defied several orders to move by school authorities.
If this is not handled immediately, the other students get the message that they can defy authority on school grounds and suffer no consequences.
Kids then carry this behavior out into the malls, movie theaters - and workplaces. (kids come in “shocked” after being fired from Jack-in-the-Box for in 1/2 hour late and/or calling in sick whenever they don’t feel like working - one employer told me he has a terrible time finding high school kids who will work on Friday, Saturday or Sunday, IOW, the kids want to tell the employer how it’s gonna be).
You can’t imagine how entrenched this attitude is.