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Story summary
- Federal authorities intensified their investigation into Nancy Guthrie's disappearance in Tucson, Arizona, focusing on a single backpack.
- They are collaborating with Walmart's corporate security to analyze sales records and surveillance footage.
- Retired Federal Bureau of Investigation Agent Jason Pack says the approach narrows suspects by tracing backpack purchases.
- The family reported Nancy Guthrie missing on February 1, 2026 after she was last seen on January 31, 2026.
