In California, we have the
Megan's Law .
Only problem with this situation is that he didn't register his new address. So, by doing this how the hell are you to know if you're new neighbor wants to have a good time with your 9yo daughter?
Even with this info available, it still failed. It is ultimately up to the parents to protect their children.
?, how did he get the girl without alerting the parents? Seems to me that there may have been some trust between him and the 9yo girl.
And being a father of 2 girls 5 & 9yo, I'd say that the only justice would be to allow the parents to decide how he dies.