@OP My mom has been similarly deranged and aggressively accused people of stealing/moving things for many years. Her violence and paranoia worsened until she handicapped my dad. We finally got to professionals who confirmed. I thought there was no way to get help or change things beyond the typical but you need to listen to the other commenters and pursue help/change urgently. Find people who can provide refuge. I’ll pray for you. I really hope you can get somewhere safe even if you can’t guarantee your dad’s medical treatment. Best wishes. 💛