So sorry to hear of this,
Michael, the best you can do is just be supportive of your daughter---I would encourage her to have professional counselling for post-traumatic stress, preferably from a female psycholgist, as talking to another woman would help put her at ease. I know you're not asking for advice here, that you just need to vent, but that is the best way I know of for you to help her, because she will be dealing with this event, and she needs the best help she can get in doing so.
I know it would make you feel much better to wipe a gravel road with this POS bass turd, and then pave him. I have a like-new set of tires on my truck, I'd sure be willing to put some miles on him myself. His violence probably comes from being a victim of it himself, as No Good begets No Good, but he failed to rise above his conditioning, and forfeited any rights to sympathy in my book. He's going to learn just how harshly the prison system deals with those who hurt women and children once word gets around, and in prison, word always gets around. This NGSOB may get religion.
Best Wishes for your family's healing. Do some lure and bike painting therapy, there is no better way to heal from this than immersing yourself in that which you do best. Your healing will help your family's.
Dean