In 2021, Wisconsin native Chandler Halderson reported that his parents, Bart and Krista, went missing after the July 4th holiday weekend. A week later, authorities found their dismembered remains, and information from his girlfriend's Snapchat account linked Chandler's location to one of the murders. But why would a son be driven to such lengths to kill his parents? Erin Moriarty dives into the secrets Chandler was hiding leading up to the murders, and the bizarre jailhouse texts between him and his girlfriend, in the conclusion of the "48 Hours" investigation, "The Snapchat Clue".