Aug. 13, 2018: Shanann is dropped back at home in the early hours of the morning from her trip to Arizona. She's seen on her home's security camera entering the house. Chris originally told police that he had nothing to do with her disappearance. He eventually told his dad at the police station that Shanann killed their daughters, so he snapped and killed her. The real story that he finally admitted to later was that he told Shanann a few hours after she got home from her trip that he wanted out of their relationship. They argued briefly when he strangled her. He put her body in his truck and put his daughters in the back seat. He drove them out to one of his work locations and buried Shanann in a shallow grave. He then smothered both of his daughters, killing them, and dumping their bodies in an oil tank. He then went to work.
Aug. 14, 2018: Chris is formally questioned by police and maintains that he had nothing to do with Shanann's disappearance.
Aug. 15, 2018: Chris takes a polygraph test and fails. Police urge him to come clean. He originally confesses to his dad at the police station but then cooperates with police and leads them to the bodies.
Aug. 16, 2018: The bodies of Shanann, Bella, and Celeste are recovered.