Don,
I believe you when you say it could cost you your life. None of us want to see that happen. However you do it, you need to make this behavior stop ASAP.
I believe that the treatment you describe constitutes elder abuse, which is a criminal matter. I'd consider filing a police report. I would also address it with an attorney. If you don't already have access to counsel, Prepaid Legal is a legal insurance program which, I believe, is based in your state and can inexpensively (approximately $25/month) provide advice on legal issues as well as discounted services if necessary.
You need a barracuda on your side. All of us will do what we can in the way of prayer, letters, and encouragement, but ultimately you are your own best advocate until you can get a local heavyweight in your corner. I hope that happens soon.
Best wishes,
Richard