Little-known cellphone unit could help crack Guthrie case as digital net tightens: retired FBI agent
Investigators canvass the neighborhood around Annie Guthrie’s home in Tucson, Arizona, Tuesday, February 10, 2026. The investigations into the disappearance of her mother, Nancy Guthrie continues. (DWS for Fox News Digital)
The FBI’s Cellular Analysis Survey Team (CAST) is one of the bureau’s most critical tools in missing person cases and may be the key to cracking the Nancy Guthrie case, but retired FBI supervisory special agent Jason Pack said most Americans have never heard of it.
Pack — who served as Chief of Staff for FBI Public Affairs, negotiator and child abduction team leader — told Fox News Digital that authorities likely have suspects in Guthrie’s disappearance, but data is still being refined by the specialized team.
“They have data, mountains of it,” Pack said. “Names have surfaced and been evaluated. Some have been cleared. Others may still be in play in ways we aren’t seeing publicly.”
CAST specialists are trained to analyze cellular data at an extraordinarily granular level.
Pack said the team is not just pulling call logs, but mapping the movement of every phone that pinged off towers in and around the area of interest during the relevant time windows.
“Every cellphone is essentially a tracking device its owner carries voluntarily,” he said. “CAST can reconstruct where a phone traveled, when it arrived, how long it stayed, and where it went next. In a kidnapping investigation, that capability is devastating to anyone who thinks they moved undetected.”
However, Pack said to access phone records and data, agents first need warrants and subpoenas.
“It comes trickling in, sometimes in waves, sometimes in fragments,” he said. “Each new batch of records has to be ingested, analyzed, and cross-referenced against the existing evidence map. Every new data point can confirm a theory, eliminate a lead, or open an entirely new investigative thread. … The search warrants tell us the investigation is active and aggressive. The subpoenas tell us the digital net is widening.”
In the Guthrie case, Pack speculated the court orders are at various stages, and developments are “happening around the clock.”
“What agents and deputies are doing right now is exactly what they should be doing. Letting the cell records, the video, and the tips converge,” he said. “… That’s when you see law enforcement activity like we are seeing or hopefully an arrest. Not before. The investigation isn’t stalled. It’s building.”
Fox News Digital’s Jon Street contributed to this report.
A $10 Walmart gun holster could help identify suspect in Nancy Guthrie case
A surveillance image, left, shows an unknown suspect in the Nancy Guthrie investigation with what appears to be a holstered firearm. On the right is a photo of a Strategy Large Frame Revolver Hip Holster identified by a police expert as the same holster worn by the suspect in the surveillance image.
A gun holster visible in surveillance footage taken outside the home of Nancy Guthrie — the missing mother of “Today” co-host Savannah Guthrie — may offer important leads to investigators, experts said Friday.
The holster appears consistent with a brand sold at select Walmart stores for approximately $10. According to the product description, the water-resistant holster is designed to hold a revolver with a barrel measuring between 4 and 6.5 inches.
As of Saturday afternoon, the holster was listed as in stock at five Walmart stores in the Tucson area.
This is an excerpt from a story by Michael Ruiz and Amanda Macias.
Clock ticking in Guthrie investigation as agents race to process potential evidence
FBI agents inspect a Range Rover following a traffic stop where one man was detained in Tucson, Arizona, Friday, Feb. 13, 2026. Sources tell Fox News Digital that the stop is connected to a search warrant served at a home near Nancy Guthrie’s house. The 84-year-old is believed to have been abducted on Feb. 1, but no suspects have been publicly identified. (Kat Ramirez for Fox News Digital)
An apparent large-scale operation Friday night tied to the disappearance of Nancy Guthrie marks a “significant escalation” in the case, with investigators now racing to canvas neighborhoods and fast-track critical DNA evidence, according to a retired FBI agent.
Acting on a lead, authorities on Friday executed a federal search warrant at a Tucson-area home roughly two miles from Guthrie’s home, and towed a gray Range Rover from a nearby parking lot.
Jason Pack, a retired FBI supervisory special agent, told Fox News Digital the developments have the “hallmarks of agents acting on specific, actionable intelligence.”
While the searches and interviews were ongoing Friday night, Pack said other teams of agents and analysts were likely already planning a full neighborhood canvas around the location that was searched.
Aside from canvassing the area, Pack said the most pressing concern is likely processing new evidence collected from at least two scenes Friday night.
“DNA that doesn’t belong to Nancy Guthrie or anyone close to her has already been identified at her property. Gloves have been recovered. Now you’ve got whatever was inside that Range Rover that warranted agents draping it with a tarp before the cameras could see,” he said. “All of that evidence needs to get to a lab.”
Pack stressed the situation is a race against the clock.
“Do they wait until Monday to commercially ship it to a private lab? In past high-profile cases, I’ve seen FBI aircraft used to immediately shuttle evidence to the FBI Laboratory at Quantico,” he said. “That eliminates days of waiting. In a case involving a vulnerable 84-year-old woman who is without her heart medication, where every hour matters, you don’t wait for FedEx on Monday morning.”
Read the full story from Fox News Digital’s Alexandra Koch and Jon Street here.
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