No way a drunk man can cause that much damage with his hands.
Either it wasn’t him, or he used something other than his hands. But that also would likely point to someone else since family members almost always use their hands during family violence, it has to do with the personal nature of the attack.
Not logical to think that. Then again, that rubber band story is even less logical, I could see the brother pushing him down the stairs though.
I can see male prostitutes or their pimps getting violent when stiffed on payment.