The Creek — Jennifer L. Holm

Caleb Devlin is a legend on Mockingbird Lane, the boy who terrorized an entire town before he got sent away. They say he hurt other kids, tortured animals, set fires, and did things grown-ups speak of only in whispers. But that was all before Penny and her little brother moved here.

Now Caleb's back, older and more dangerous than ever, and terrible things have started happening again. The whole town knows he's responsible, but the police can't do anything without proof. So Penny and her friends have no choice but to try to stop him themselves.

Except now he's after them.