Dale Massie is the killer. He killed his wife and two children because they were going to leave him. He dumped them down into "The Devil's Throat," which is a well in the woods. Dale goes after Cooper and Leah, and Cooper kills Dale by shattering the skylight on the roof of the house and Dale falls to his death. The Tilson's stay at Cold Creek Manor and Dale is buried in the family cemetery on the Manor's grounds.