It's  good to call the police on possible pedophiiles.
Carl is in the park when he notices a little girl Jane being stalked by a pedophile, Phil.
Carl wants to do something about the Pedophile.
Carl calls the police and tells them there's a pedophile stalking children in the park.
Carl tells Phil to leave and if he catches him again he'll do something to him.
The police come arrest Phil and take him away preventing him from offending again.
Phil leaves but later comes back and stalks a different child and abducts it.