Should you? You don't know exactly what happened. Unless you were there, of course, but I presume you weren't. Besides, if all that guy did was stand around while his girlfriend beat someone else up I don't see the moral imperative, even if he is family.
nah from what I heard from everyone else there she had it coming. The girl that beat her up got arrested and even that was dumb, they just want to fuck with everyone they can and I'm not gonna let him get violated for something so stupid if I can help it. The girl got beat up because she got in the other girl's face, put hands on her and ran her mouth. She had several chances to take her ass whooping and go away but she kept coming back so his gf kept beating her up. If she was getting jumped a couple of guys there would have stopped it, I know them.
I don't wanna get involved either though which is why I'm trying to just txt her over the phone or call if I have to to get her to drop it.