My Dad is 76, still lives in his home, and until recently I didn't worry about his health or mind. He rents rooms in his home to help him pay the bills. A little while ago he expressed concern that one of his roommates was taking advantage of him, as the roommate (Bob, lets call him) had moved his girlfriend into the home without my dad's permission. My dad includes utilities, etc. in the rent. He said he would talk to the roommate about it, and limit the gf's presence to visitations. I decided to look into things a little more, and found that Bob has an extensive criminal history, that involves multiple assaults (most domestic violence, but not all), stolen cars, drug possession, sodomy in the first degree, resisting arrest, 3 DUIS.... for starters. I talked to my Dad about it, and Dad got defensive, and said he knew about it, but that Bob had come highly recommended by his parole officer. So I got the parole officer's card, and called him, and was told and no one is EVER recommended by a parole officer to a potential landlord, it's against policy. When I told my dad this, he didn't remember claiming that he had talked to the officer, and he didn't remember giving me the card. He's a high risk for Alzheimer's, but otherwise seems to be doing OK. Is my Dad protecting this guy? Why woudl he do that? He's only been renting for about 3 months, although I guess he has rented from my Dad before (but then went to jail for hitting his pregnant girlfriend). I am supposed to be leaving the state for grad school in a few months, and have started pressuring my Dad to get a new roommate before I go. He won't do it, and says if I don't drop the issue he doesn't want me around anyways. What on earth is going on here?? Is he being manipulated? Am I overreacting? Should I really move out of state, leave my Dad alone with this guy, and not give it another thought?