My boyfriend got raped by a man and physically assaulted him after that

It’s not possible to me to talk with female friends about it and that’s very surreal to me. I noticed that my bf displayed a strange kind of aggressiveness towards other men in the last time. And after I followed it up he confessed to me that he got raped by a man. It was a acquaintance from a friend and he got chloroformed. He kind of participated in it because he threatened him. But at least he doesn’t feel ashamed for this part since he had no choice. I am paranoid to write about the scumbag but first I thought that this physically assaulting part could be made up from him to cope with his anger but it’s true… I am afraid that the police could be there every day idk if hes alive because he is apparently in a critical state ( we live in Europe) and I feel sad about the whole situation generally and that he could be punished, his general behavior and we had sex a few times after that and he wanted another woman and was really aggressive to both of us. I am really confused now