My grandma has Alzheimer's and her son is extremely toxic and lies and steals and verbally abusive. Hes threatened multiple times to hurt her. Hes been out of everyone's lives for almost 10 yrs and now popped in pretending to be all nice and wanting to randomly keep showing up at her house. He's threatening and saying horrible things to my mom who lives with her and is her primary caretaker. Any way to protect them?