Are you kidding me? Educators hang together, as if you didn't know that. Whistleblowers are hard to find in any industry--even more so in unionized industries (your pretense of ignorance on this subject won't be accepted as a legit excuse as you've reached your ignorance quota for the week).
There was even a story a month or so ago about cops coming & arresting some high school counselor on-campus because she knew about an abusive situation occuring between a minor student and an adult male, and there were the school's administrators, harking to the media how great this criminal counselor was and how misguided the cops were...even though they gave her a chance to correct her omission before arresting her.
It wasn't the administrators or peers on that campus who blew the whistle on this guidance counselor. Nope. Union members stick together for the most part.