FBI intensifies search for Nancy Guthrie as mysterious ransom notes emerge

The search for Nancy Guthrie has reached a critical turning point as the FBI expands its investigation across the border. Federal officials have requested assistance from Mexican law enforcement, acting on theories that Guthrie may have been moved toward Mexico following her disappearance from Tucson. While border cameras have yet to provide a definitive sighting, investigators are meticulously reviewing footage and electronic data for any sign of her whereabouts.

Adding to the complexity, a new ransom note has surfaced, described by investigators as highly technical and sophisticated. This message demands nearly $6 million in a specific form of cryptocurrency, differing from earlier demands. As the Guthrie family navigates this harrowing ordeal, the FBI remains vigilant, warning that any opportunists attempting to scam the family will face severe federal consequences. Meanwhile, detectives are "shaking the trees" for physical evidence, searching for a "unicorn" suspect who may have purchased specific clothing items and a holster found during the investigation.