Nancy Guthrie, 84-year-old mother of NBC Today anchor Savannah Guthrie, vanished from her Tucson home on February 1st, 2026. Her doorbell camera went offline at 1:47 AM. Her pacemaker stopped transmitting at 2:28 AM. Thirty-four days later — no arrest. But the FBI's Cellular Analysis Survey Team is pulling cell tower data that Sheriff Chris Nanos confirmed is already flagging things. Digital forensics expert Heather Barnhart — who tracked Bryan Kohberger's phone in the Idaho murders case — says the same technology that convicted Kohberger is now in play in Tucson. And she says the suspect's biggest mistake may not have been the night he took Nancy. It may have been every night he came before. In this video we break down exactly how cell phone evidence works, why going dark on the night of a crime doesn't erase what the weeks before it recorded, and what six active investigative tracks are building toward right now. If you have any information about Nancy Guthrie's disappearance: 📞 1-800-CALL-FBI 🌐 tips.fbi.gov 💰 $1,000,000 reward — anonymous — cash All sources are linked below. Every claim in this video is verified and documented.
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