My younger brother is abusive in romantic relationships
So there have been 3 girls that my brother has dated who have called me crying saying my brother was physically abusive towards them, whether the cops get called or not he goes to jail then they release him with no consequences. I got better at dealing with the aftermath as time went on I even stayed friends with the 3rd girl who called. He recently logged into his Instagram on my phone and I saw on my notifications that he's been slapping and leaving bruises on this girl he's talking to (he obviously doesn't only talk to her) idk ive been starting to grow more angry with him and idk how to address this issue with him. I've told him in the past that he needs to go to therapy and process all the abuse he went through as a kid. Unfortunately he doesn't believe in therapy. Im not sure if I should cut him off or just anonymously say something.