|Dates||???? - 2009 (killed by the Girl in the Wall)|
|Episode(s)||4.11 Family Remains|
Bill Gibson's wife died giving birth to their daughter Rebecca, who Bill subsequently raped. She had two children, a boy and a girl, before she hung herself in the attic. Bill Gibson kept the children captive their whole lives, forcing them to live in the basement and the walls of the house. Eventually they escape and kill him. Sam described him as a monster after reading Rebecca's diary. Eventually the boy was killed by Dean in self-defense and Brian Carter killed the girl to save his family.