Yes, but if charged with trespass they have to show that you knew you were banned.

If she was co-owner she didn't need a POA. Now you have to sue mom.

I see no conflict under these facts..........................

If you don't pay, they have to decide whether it is worth suing you for $150. None of us can predict if they will.

These are questions for the lawyer who represented you and has all the facts. We don't.

Probably yes, but speak to your mom. She can inquire of the school's policies.

This is not a legal question as best I can tell.......................

Lawyers here can not reach out to you. You can use the Find a Lawyer tab above to locate lawyers in your area.

These are very serious charges. Your grandson needs a lawyer ASAP.

Consult a personal injury lawyer in the city where it happened.