Watch: Investigators Broaden Timeline, Search Radius in Nancy Guthrie DisappearanceAuthorities are expanding the search for Savannah Guthrie's mother. After doorbell surveillance footage of a masked individual from outside Nancy Guthrie's Tucson, Ariz., home was released to the public Feb. 10, officials have adjusted their timeline and search radius for the 84-year-old following an outpouring of leads and tips. Two sources with direct knowledge told MS NOW on Feb.