Mega Edition: Alex Cox And His Role In The Murder Of Tylee And JJ (9/15/26)

Alex Cox was Lori Vallow Daybell’s older brother and one of the central figures surrounding the deaths of her children, Tylee Ryan and JJ Vallow. Cox had already drawn scrutiny before the children disappeared because he shot and killed Lori’s estranged husband, Charles Vallow, in July 2019, claiming self-defense. Prosecutors later portrayed Cox as fiercely loyal to Lori and deeply influenced by the apocalyptic religious beliefs she shared with Chad Daybell. Witnesses testified that Lori and Chad convinced Cox that he had a divine mission to protect Lori, and Zulema Pastenes, whom Cox married shortly before his death, said he eventually worried that Lori and Chad were setting him up as the “fall guy.” Cox died of what authorities ruled natural causes in December 2019, before he could be charged or questioned further about the children’s deaths.


Suspicion surrounding Cox’s role in Tylee and JJ’s murders was driven largely by cellphone data and the timeline of the children’s final known movements. Tylee was last verifiably seen on September 8, 2019, during a trip to Yellowstone with Lori, JJ and Cox; the next morning, Cox’s phone placed him for hours on Chad Daybell’s property near the area where Tylee’s remains were later found. JJ was last seen alive on September 22, when witness David Warwick said Cox carried the sleeping boy into Lori’s apartment; the next morning, Cox’s phone again placed him at Daybell’s property, and investigators later alleged that Cox transported JJ’s body there. JJ was found wrapped in plastic and duct tape, while Tylee’s remains had been burned and dismembered. Cox was never tried, so his precise role was never adjudicated in court, but prosecutors in Lori and Chad’s cases treated him as a key participant in the conspiracy and disposal of both children.



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