I took care of my dad years ago and he was mentally abusive toward me. he threatened me with a knife at one time and went to jail for 10 months. Now he lives with my brother and sister in law and he abuses her. He doesnt do it around my brother, so my brother does not believe it happens. She has picture proof. I have the proof also. how can she get him out of her home so that she feels safe. she has to lock her bedroom when my brother is not at home. there are sites for elder abuse but no sites for the elderly who do the abusing. how can i help her be free of his rages
They should also be aware that he's a planned , and serial, abuser - he knows when to do it to prevent his son from becoming aware of what he's doing.
I would also ask for advice on preemptively getting him removed if he refuses to leave voluntarily, as well as advice on a placement to keep him from returning to the home. Go with SIL to the police and show them the photos or other evidence.
Once he's out, ask the police how to get a PPO (Personal Protection Order) to keep him from returning to the home, under any circumstances.
Nursing homes probably won't take him, so he may have to go into a more secured facility run by the corrections department.
But, he HAS TO GO!
Have you contacted a battered women's shelter, or any agency that intervenes on behalf of physically battered women?