Lori Vallow Trial: Cause of Death for Son Revealed, Daughter's Unknown.

Forensic pathologist revealed that Lori Vallow's 7-year-old son, JJ Vallow, died of asphyxia by a plastic bag over his head, and her 17-year-old daughter Tylee Ryan died of homicide by unspecified means. Vallow is charged with killing her two children and her husband's first wife, Tammy Daybell. JJ's body was wrapped in plastic and tied with duct tape, while Tylee's remains were dismembered and burned. Vallow and her husband Chad Daybell are accused of multiple counts of conspiracy to commit first-degree murder and grand theft by deception, and first-degree murder related to the deaths of Tylee, JJ, and Tammy Daybell.