But there is also nothing right about raping a young girl.

I am absolutely one hundred precent not defending rapists.

There is especially nothing right about the police not having enough evidence to even look at the guy.

Thats why I think this story is fake every time it makes the rounds. A child needing stitches from some sort of rape after being at a friend's house and that child stating who raped her is definitely enough evidence to get a warrant. At which point the stated video tapes would have been found.

It's a thing that needs to get done because it's the only form of justice that will come for his daughter, when the justice system fails.

It's not. Murder is not justifiable. If the guy did it and the system fails, keep tabs on him, catch him in the act, use lethal force then. That's the only way it's justified and morally sound.