India, June 13 -- Nancy Guthrie remains to be found after her family reported her missing on February 1. Authorities believe she was taken from her home the night before. Amid the search for the 84-year-old mother of TODAY show host, Savannah Guthrie, a 'wrench attack' theory had come up.

This theory posits that Guthrie was targeted by a hired assailant who works for a remote 'mastermind' seeking to extort money from the family. Now, as the Pima County Sheriff's Department has completely rejected the theory, a former FBI agent has raised critical questions in the Nancy Guthrie case.

Jennifer Coffindaffer, who was a Special Agent with the FBI, noted that CertiK had officially classified Nancy Guthrie's kidnapping as a 'wrench attack'.

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