My 18 year old son assaults me on a daily basis hes 16 stone and 6 foot 4 He verbal abuses me all the time and hits me violently despite being unable to defend myself as I have bad arthritis, im a professional person, he has asparagus and had incidents of violence when he was younger towards other children but last few months it is at me, last nite he got me in a corner when I entered the room when he was watching tv and left me bruised, where do I go for support or do I get the police involved ?