Chelsea was screaming in the upstairs bedroom. She wasn’t screaming because she saw what Shane was doing to me though—because the door to the bedroom was closed. She was screaming because somebody was coming at her with a knife. Except it wasn’t Shane. It couldn’t have been. There was another killer in the house that night. Out of the three survivors, there was only one other person it could have been. Oh my God. Tim and Shane did it together.