He didn't because he didn't want to admit that she used to beat him regularly. Also there were times he defended himself and it just became a fist fight, he was afraid of going to jail and if his friends found out.
I agree. I found out that my stepson had been beaten by his ex girlfriend I supported him by listening to him and helping him get her away. He didn't want to press charges against her.
When I tried to tell someone, I got the classic response, " What did you do to deserve it?" ( that was from my family) form there I knew I was alone with this.