I don't know who you think you are, but you can't tell her that "there're better ways to get things solved".
First of all, she was attacked. This is her right to say she doesn't want him around her kid. You can't tell her to back off and not say what she wants to say.
And it doesn't matter to her what he's been through, whether he's been punished by the law or not. It's NEVER going to be over for her. Okay? NEVER. If you ask me, he shouldn't be breathing in and out.
I'm a merc for hire, I have no ethical problems with homicide.