Three members of the same family were found dead in a home over a five-year span, but the deaths of Bill and Bridget Harrison were not considered murders until after their son Caleb was killed years later.
Police alleged the Harrisons were killed at key moments in an acrimonious custody dispute with Merritt, who had two children with Caleb. Police did not classify the 2009 and 2010 deaths of Bill and Bridget as homicides until after Caleb was killed in 2013.
It was then realized that two people who were responsible for killing the family over a five-year span, it was Caleb's ex, Melissa Merritt and her husband, Christopher.
Watch Christopher confession to police after he and his wife were arrested.