India, April 6 -- With Savannah Guthrie set to return on the Today show after more than two months' hiatus, the search for her mother is turning cold by the day. The FBI and the Pima County Sheriff's Office are conducting a country-wide search for the 84-year-old. But so far, no solid lead has come up in the case.

Nancy Guthrie remains missing and new updates on a potential suspect are becoming rarer with each passing day. The FBI released a video of the person of interest from the doorbell camera of Nancy Guthrie: the only lead on the suspect, so far.

On Sunday, exclusive details about the search were revealed in a report by NewsNation. The outlet, citing sources familiar with the investigation, said that despite footage showing a mask...