My neighbor is a pedophile

His name... I cannot say. But I can say he works for the FBI or something, and uses it to his advantage. He's a sexual pervert and a child molester. He stole this girl i loved so much growing up and was about to contact to try and rekindle things. I don't know what to do about this, all I know is this shaffer (annother word for T***) needs to die.

How would I go about contacting his business and telling them what he does. He sure as h*** isn't undercover. He''s a true blue paedophile.