Oh man! Ashi I am so sorry((((hugs))))
Though I agree with the others that the authorities are invovled, you must be careful. I remember once Social Services called my house and spoke to my mom about an abuse case against her. It was the first time she heard about it and was enraged. The woman asked to speak to me, since I was the one who filed the complaint. My mother was hitting me in the head, pinching me and pulling my hair when I was on the phone with the lady. So please use caution, so that your brother remains safe. After the police leave he may go into a fit, and do even more damage.
Have a plan of getting your brother out, and your mother as well. Don't wait for him to do this again, or leave himself.
Do you realize he could have DIED! Yes, he could have died from falling down the stairs. This is not a matter to take lightly, and you need some help. I suggest going to visit, do not call the Social services in the area, take your wife as a witness.
No wonder you get so angry, I would be infuriated as well. But remember to take care of you, and use your judgement, so you don't end up with charges against you. If you need anything I am a phone call away
wendy
When I leave, you will know I have been here