It’s a union gig and an arbitrator will always rule in favor of the employee. That’s how.
> It’s a union gig ... <
I don’t think that’s true in this case. Principals - and other administrators - are usually not members of any union. This guy might be a member of some principals’ association. But such associations are rather toothless.
It’s more likely that this is just a case of individual school administrators looking out for each other.