TUCSON, Ariz. — Pima County Sheriff Chris Nanos said Thursday that digital evidence has become the cornerstone of the investigation into Nancy Guthrie's disappearance, revealing that investigators are painstakingly cataloging "thousands and thousands of videos" from doorbell cameras, traffic intersections and private security systems to build a comprehensive timeline of the 84-year-old's final hours before she vanished from her Catalina Foothills home.

More than 100 days after Nancy Guthrie was last seen on January 31, the sheriff's office is shifting its focus from active search efforts to a meticulous digital reconstruction of events. Nanos confirmed that footage captured on a Ring doorbell camera shows a masked individual approaching her residence around the time she returned home after a family dinner with her daughter Annie and son-in-law Tommaso Cioni. The sheriff described the video as one of several critical pieces in an ever-expanding digital map authorities are constructing.

"There's thousands and thousands of videos out there from intersections and Ring cameras that we have to catalog," Nanos told reporters. "We are making meticulous catalogs of digital evidence to identify patterns that may ultimately expose the culprit."

The update marks a significant evolution in the high-profile case that has captivated national attention, largely due to Nancy's connection to her daughter Savannah Guthrie, co-anchor of NBC's "Today" show. While early weeks focused on physical searches of the surrounding desert areas, authorities now emphasize forensic analysis of electronic trails, including cell phone data, financial records and extensive video surveillance.

Massive Digital Evidence Review........

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