Talk to him about it. You'll know what to do based on how open and frank he is about his connection to these schools.

He may have very well moved to disconnect himself from those organizations when he saw what was going on.

My husband's doctor left the original practice where we met him because he saw shady dealings going on by the head physician/owner of the practice. He was very open with us about the situation when we moved with him to his private practice. Sometimes, until you are working in an organization, you do not see the problems with it. They are good at hiding the bad from the public and even prospective employees.