Nancy Guthrie's kidnappers may have underestimated just how frail the 84-year-old was before snatching her from her Tucson, Ariz., home. There's new speculation that Today show host Savannah Guthrie's mom may have suffered some sort of unexpected fatal medical episode, leading the perpetrators to dump Nancy's body and move on, Wonderwall.com can report. The search for the missing Arizona grandmother is now in its third month with little progress to show for it.