As far as the taping goes get Risk Management/Legal Dept involved ASAP. They need to be notified immediately. Thhey will advise you how to prceed or take over. Thy are looking to sue down the line. It is wise that none of you provide care alone. DOCUMENT DOCUMENT DOCUMENT.
If you see abuse you are a mandated reporter. Get Social Services, APS, Tthe police, etc. involved immediately. I know you haven't witnessed it as of yet but if this truly happening and others haven't gotten the proper authorities involved it is shameful. A big part of our job is advocating for those who can't advocate for themselves. This woman is in such a vulnerable position. Pls step up and do the right thing for her. I would also not leave him in the room alone with her either. God knows what he does when no one is around. Do thorough skin assessment for bruising, burns, etc.