Arizona investigators are intensifying their search for answers in the ongoing disappearance of Nancy Guthrie, a case that has captivated the public for nine months. Guthrie, the mother of NBC News anchor Savannah Guthrie, was reported missing on February 1, 2026, after failing to appear for church. Her family last saw her at her home in the Tucson area around 9:45 p.m. on January 31, 2026. As of late October 2026, she remains unaccounted for, and no arrests have been announced by law enforcement. Pima County Sheriff Chris Nanos confirmed that the Nancy Guthrie Task Force has been collaborating with laboratory partners to advance DNA analysis. Recently, members of the task force traveled to Florida to consult with scientists regarding new approaches to the forensic evidence. While Sheriff Nanos did not disclose specific details about the DNA evidence, the laboratories involved, or whether the Florida meetings yielded new findings, the collaboration underscores the critical nature of biological evidence in the investigation. The sheriff has repeatedly urged the public to remain vigilant and report any information, no matter how minor it may seem. Emphasizing that no tip is too small, Nanos stated that even the slightest detail could be pivotal to solving the case. Authorities are actively seeking tips from the community and have provided multiple channels for the public to contact investigators. Individuals with information regarding Guthrie's disappearance are encouraged to call the Pima County Sheriff’s Office tip line at 88-CRIME or contact the FBI at 1-800-CALL-FBI. The investigation remains active, with authorities continuing to explore all avenues to locate Guthrie and bring those responsible to justice. The case highlights the ongoing challenges in missing persons investigations, particularly when physical evidence is scarce or requires advanced forensic techniques to interpret. As the search continues, the focus remains on leveraging scientific advancements and community cooperation to resolve the mystery surrounding Nancy Guthrie's disappearance.