TUCSON, Ariz. — Nancy Guthrie, the 84-year-old mother of "Today" show co-anchor Savannah Guthrie, remains missing nearly eight months after her disappearance from her Tucson home, as investigators continue processing tens of thousands of tips and an unverified online claim about an FBI search near her daughter's neighborhood has generated fresh public attention.

Nancy was last seen at her home on the night of January 31 and was reported missing the following day, after having had dinner earlier that evening with her daughter, Annie Guthrie. Authorities say Tommaso Cioni, Annie's husband, brought Nancy home following that dinner, making the couple among the last people known to have seen her before her disappearance. Authorities have since said they believe Nancy was taken from her home by force.

Pima County Sheriff Chris Nanos has said investigators have received approximately 40,000 to 50,000 tips over the course of the investigation, alongside ongoing DNA analysis, review of surveillance footage and examination of electronic evidence, with laboratories across the country assisting in the forensic work. No suspect has been publicly identified as of the most recent update.

Despite persistent online speculation surrounding Annie Guthrie and Tommaso Cioni given their proximity to Nancy on the night of her disappearance, Sheriff Nanos has said the broader Guthrie family, including siblings and their........

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