My FIL has dementia and Alzheimer's. My husband has POA. We have been in touch with attorneys and want to get him back here. FIL is very angry with my husband, says he tries to control him. My FIL overdosed on his blood thinner medication 900% in three days, he can't be living alone. We have secured a room in a beautiful assisted living center just down the road. BIL is very undependable and not financially or mentally secure.
Your husband needs to go to his father's house and bring him to the assisted living place. Now.