Not to take his side (cause he sounds overall unpleasant to me,) but I know in a regular company managers are strictly forbidden from discussing personnel issues outside of the specific employee, human resources, and chain of management. Even if something impacted someone outside of that chain, we could only communicate that the problem was addressed and what the procedure is if the problem reoccurs. I would guess a public school would be under similar strictures and perhaps moreso if there is a union involved.