I understand how you guys feel, but in the end, using violence against the person would only harm your child more, by putting them in a position where they'd lose a father for a long time, possibly forever, because they'd be in prison. The idea that a jury would find a person innocent is pretty much hokum. They will find a person guilty, and sentence them to long terms in prison.
The situation will never be resolved unless people step up and file charges to stop predators from moving from place to place, and getting away with it. Too many people fear stepping up because they believe there's a stigma attached to doing it, as if they were guilty of allowing it to happen. That's not the case, but beliefs inside of us tend to make us do some dumb things at times.