The Tragic Deaths of JJ Vallow and Tylee Ryan: Updates from Lori Vallow Daybell's Trial.

Forensic pathologist Dr. Garth Warren testified in the Lori Vallow trial that seven-year-old JJ Vallow died from "asphyxia by plastic bag over the head and duct tape over the mouth." JJ also had low levels of alcohol, caffeine, and theobromine in his system, but it is unclear if he had consumed or was given the drug GHB. Warren also testified that Tylee's cause of death was a homicide, but the exact means of how she died could not be pinpointed.