None of us knows the case, or your involvement in it, so we can't say.

Your original discharge date is no longer valid, and you likely have additional charges against you.

You ask "can he be arrested" but then say he was, so the obvious answer is "yes he can." He will need to retain an attorney to attempt to resolve it.

It sounds like you are the target of an investigation. You really need to retain counsel ASAP.

IMO it is long past time for any potential lawsuit.

As lawyers we can't answer whether it is "wrong." That is for the school to decide.

I am not sure there is a definite answer to that, but I can't see the police pursuing an investigation because your employer went into a room they...

This is a general Q&A site. You have not asked a question.

You can file a complaint with the state bar.

Yes you can be AWOL if sick. But if you were on quarantine, I doubt they will push it.