Between September and October 2019, 16-year-old Tylee Ryan, her seven-year-old adopted brother Joshua ‘JJ’ Vallow, and 49-year-old school librarian Tammy Daybell were murdered in eastern Idaho in what became one of the most chilling doomsday cult conspiracies in modern American jurisprudence. The perpetrators—author Chad Daybell and his new bride Lori Vallow Daybell—professed extreme apocalyptic beliefs, classifying family members as ‘dark spirits’ and ‘zombies’ whose physical bodies required destruction. When the children vanished without a trace, a multi-agency federal and state investigation utilized cutting-edge cellular GPS telematics, clandestine grave archaeology, mitochondrial DNA matching, and exhumation autopsies. This comprehensive forensic analysis explores the grave recoveries, DNA evidence on duct tape, trial litigation, and death sentence.
Executive Case Factsheet
- Victim(s): Tylee Ashlyn Ryan (16), Joshua Jaxon ‘JJ’ Vallow (7), Tamara ‘Tammy’ Daybell (49)
- Date of Incident: September 8, 2019 – October 19, 2019 (Murders); June 9, 2020 (Remains discovered)
- Primary Crime Scene / Location: Daybell residence and grounds, Salem, Fremont County, Idaho; Rexburg, Madison County, Idaho
- Lead Investigating Jurisdictions: Rexburg Police Department, Fremont County Sheriff’s Office, Federal Bureau of Investigation (FBI), Idaho State Police
- Key Forensic Evidence: Cellular GPS telematics tracking Alex Cox to pet cemetery, burnt/dismembered human remains in tree grove, duct tape with Lori Vallow DNA, asphyxiation toxicology
- Suspect(s) / Perpetrator(s): Lori Norene Vallow Daybell (47), Chad Guy Daybell (52), Alex Cox (deceased accomplice)
- Legal Outcome & Status: Lori Vallow convicted of multiple life terms without parole (2023); Chad Daybell convicted and sentenced to death (June 2024)
The Disappearances in Rexburg and the Hawaiian Elopement
In September 2019, Lori Vallow relocated her children from Arizona to an apartment complex in Rexburg, Idaho, to be near Chad Daybell, a self-published apocalyptic author. Tylee Ryan was last seen alive on September 8, 2019, during a family day trip to Yellowstone National Park. Seven-year-old JJ Vallow, who had autism, disappeared from his Rexburg home on September 22.
Weeks later, on October 19, 2019, Chad Daybell’s wife of nearly 30 years, Tammy Daybell, died suddenly in her bed in Fremont County at age 49. Chad refused an autopsy, claiming she died in her sleep from natural causes, and collected $430,000 in life insurance. Just two weeks later, Chad and Lori flew to Kauai, Hawaii, and were married on a beach.
In November 2019, concerned grandparents Larry and Kay Woodcock requested a welfare check on JJ Vallow. When Rexburg Police Department detectives questioned Lori and Chad, they gave contradictory statements, claiming JJ was staying with friends in Arizona. When search warrants were executed the following day, the couple had fled to Hawaii, leaving the children unaccounted for.
Forensic Telematics: GPS Mapping the Movements of Alex Cox
The breakthrough locating the children’s remains was achieved through forensic cellular telematics conducted by FBI Special Agent Nick Ballance and FBI Cast Unit specialists.
Analysts audited cellular location data from the mobile device of Lori’s brother and primary enforcer, Alex Cox. The forensic geofencing data revealed that on September 9, 2019—the morning after Tylee was last seen in Yellowstone—Cox’s cellular device pinged behind Chad Daybell’s property on East 1900 North in Fremont County for over two hours, situated directly adjacent to an unpaved fire pit and pet cemetery.
Similarly, on September 23, 2019—the morning after JJ was last seen—Cox’s cell phone pinged for seventeen minutes near a distinct pond and tree grove on the Daybell estate. Telematics established that Chad Daybell texted his wife Tammy that exact morning claiming he had shot a raccoon and burned debris in the pet cemetery.
The forensic cellular telematics and touch DNA analysis in the Daybell-Vallow trials represented the cutting edge of contemporary major case litigation. The integration of high-resolution cellular tower azimuth data with GPS telematics from mobile devices allowed FBI Cast analysts to recreate the exact physical path taken by perpetrators through the Salem property down to individual tree lines. When paired with STR DNA matching on adhesive duct tape and exhumation toxicology proving manual suffocation, the physical evidence created an unbroken chain of forensic custody that completely dismantled the defendants’ spiritual deflection narratives.
The June 9, 2020 Excavations: Unearthing JJ and Tylee
On June 9, 2020, an elite team comprising the FBI Evidence Response Team (ERT), Fremont County Sheriff’s deputies, and forensic anthropologists from Idaho State University executed a high-stakes search warrant on Chad Daybell’s four-acre property in Salem, Idaho.
Guided by the exact GPS coordinates derived from Alex Cox’s phone, forensic teams began systematic archaeological excavations. Near the tree grove, excavators uncovered the body of seven-year-old JJ Vallow. He was wrapped in plastic trash bags and bound tightly around the head, wrists, and ankles with red duct tape.
In the pet cemetery adjacent to the fire pit, excavators discovered the mutilated remains of 16-year-old Tylee Ryan. Her body had been dismembered, burned with accelerants, and placed inside a melted green plastic bucket buried beneath sod. Post-mortem examinations confirmed Tylee died of unclassified homicidal violence, while JJ died from asphyxiation by plastic bag and duct tape.
Tammy Daybell Exhumation Autopsy and Duct Tape Touch DNA
In December 2019, Fremont County investigators obtained an exhumation order for Tammy Daybell’s body from the cemetery in Springville, Utah. Utah Chief Medical Examiner Dr. Erik Christensen conducted a comprehensive forensic post-mortem examination.
Dr. Christensen determined that Tammy Daybell did not die of natural cardiac arrest; rather, extensive petechial hemorrhaging, bruised thoracic wall muscles, and rib trauma proved she died of homicidal asphyxiation caused by manual suffocation and physical restraint.
At the Idaho State Police Forensic Laboratory in Meridian, forensic DNA analyst Keeley Coleman processed the adhesive side of the red duct tape recovered from JJ Vallow’s wrapped body. Advanced STR DNA profiling extracted a single human hair trapped in the duct tape adhesive. The DNA profile was an exact match to Lori Vallow Daybell, establishing incontrovertible biological evidence linking her directly to the packaging of her son’s corpse.
Trials, Life Sentences, and Chad Daybell’s Death Sentence
In April 2023, Lori Vallow Daybell went on trial in Ada County before Judge Steven Boyce. Lead Prosecutors Rob Wood and Lindsey Blake presented the forensic telematics, the duct tape DNA match, and financial records proving Lori continued collecting federal survivor benefits for both dead children. On May 12, 2023, the jury convicted Lori Vallow on all counts of first-degree murder, conspiracy, and grand theft. Judge Boyce sentenced her to multiple consecutive life terms without parole.
In April 2024, Chad Daybell stood trial for the first-degree murders of Tammy Daybell, Tylee Ryan, and JJ Vallow. Prosecutors demonstrated Chad’s role as the theological architect who orchestrated the executions.
On May 30, 2024, the jury found Chad Daybell guilty of all first-degree murder and conspiracy counts. On June 1, 2024, the jury unanimously sentenced Chad Daybell to death by lethal injection. The Daybell-Vallow investigations represent a landmark triumph of forensic cellular telematics, archaeological grave recovery, and forensic pathology in dismantling complex ideological homicide networks.
Chronological Case Timeline
| Date / Milestone | Investigative Development | Forensic / Evidentiary Significance |
|---|---|---|
| Sept 8-22, 2019 | Tylee Ryan and JJ Vallow murdered in Rexburg; buried on Daybell property | Beginning of the multi-jurisdictional missing children investigation |
| Oct 19, 2019 | Tammy Daybell murdered in Fremont County; Chad Daybell collects life insurance | Chad Daybell and Lori Vallow elope to Hawaii two weeks later |
| Nov 26, 2019 | Rexburg Police attempt welfare check; Lori and Chad flee to Kauai | Multi-agency federal investigation mobilized by FBI and local police |
| June 9, 2020 | FBI ERT excavates Daybell property based on cell GPS; unearths JJ and Tylee | Chad Daybell arrested at scene; children’s remains positively identified |
| May 12, 2023 | Lori Vallow Daybell convicted of first-degree murder in Boise | Sentenced to consecutive life sentences without the possibility of parole |
| June 1, 2024 | Chad Daybell sentenced to death by lethal injection in Fremont County trial | Capital punishment verdict secured for triple homicide conspiracy |
Frequently Asked Questions: Forensic & Legal Review
How did investigators locate the bodies of JJ Vallow and Tylee Ryan?
FBI cellular analysts tracked historical GPS telematics data from the mobile device of Alex Cox (Lori’s brother). The data showed Cox spent several hours at two specific locations on Chad Daybell’s property immediately following the disappearance of each child, directing forensic teams to the exact burial sites.
What physical DNA evidence linked Lori Vallow to her son’s murder?
Idaho State Police forensic examiners recovered a single human hair embedded in the adhesive backing of the red duct tape used to bind seven-year-old JJ Vallow’s plastic bag shroud. STR DNA profiling confirmed the hair was an exact match to Lori Vallow Daybell.
How did Tammy Daybell die according to the exhumation autopsy?
Utah Chief Medical Examiner Dr. Erik Christensen determined that Tammy Daybell died of homicidal asphyxiation caused by manual suffocation, with post-mortem bruising and rib trauma indicating she had been physically restrained.
