Search for Savannah Guthrie’s mother enters third week with 40,000 leads

Investigators searching for Nancy Guthrie, 84, the mother of NBC presenter Savannah Guthrie, have entered a third week of searches and have sifted through roughly 40,000 leads since she was last seen at her Tucson home on January 31. The probe has yielded a handful of forensic and technical developments but no decisive break, prompting authorities to broaden tactics and consider cross‑border avenues of inquiry.

More than a week after Guthrie disappeared, searchers found a glove about two miles from her residence. Forensic testing of DNA recovered from the glove showed no match in the national CODIS database and did not align with DNA samples collected inside her home. In a February 17 update, the Pima County Sheriff’s Office said detectives are now exploring investigative genetic genealogy as a next step in the investigation.

Investigative genetic genealogy, the technique that helped identify Bryan Kohberger in a 2022 murder investigation, lets investigators search for distant relatives in genealogical databases to narrow suspects. The move signals a shift to longer, more technical lines of inquiry that can take weeks or months to produce usable leads and raise complex privacy and procedural questions for authorities.

Aerial searches are continuing. Investigators have deployed a helicopter‑mounted electronic emissions detector, sometimes described as a “signal sniffer,” capable of picking up small electronic transmissions, including from medical devices such as pacemakers. Former FBI agent Jennifer Coffindaffer cautioned about the tool’s limits, calling it “valuable but limited by distance” and describing the effort as a “Hail Mary,” since a pacemaker’s signal may be too faint to detect from the air. She added the technology “can help when paired with infrared scans or other aerial search methods.”

Officials have also examined possible cross‑border leads. U.S. investigators are reported to have contacted Mexican counterparts, including authorities in the border state of Sonora, and the Guthrie family asked a Mexican nonprofit that locates missing people, Searching Mothers of Sonora, to assist. Authorities caution, however, that there is no evidence Guthrie was taken across the border and no suggestion from officials that drug traffickers are involved. One reported lead in Sonora described as an alleged “purchase” reportedly fizzled, and Arizona officials and federal authorities have declined to publicly confirm the extent of any formal cross‑border coordination.

There have been additional unverified developments. A ransom demand requesting about $6 million in cryptocurrency was reportedly sent by email and forwarded to federal investigators; neither the note’s authenticity nor any demand for payment has been confirmed by law enforcement.

The case presents procedural challenges typical of missing‑person probes close to an international border: a high volume of leads, limited forensic connections to establish a suspect, and the logistical difficulty of coordinating multiple agencies and jurisdictions. For now, family members continue to press for public assistance while investigators run technical searches, expand genealogy work and follow up on tips.

Authorities have not disclosed a timetable for the next investigative steps. With 40,000 leads logged and forensic work underway, investigators say the search remains active and that any credible information from the public should be routed to Pima County detectives for follow up.