Nancy Guthrie Update: Former FBI Agent Reveals 'Big Find' in Investigation

It's now been more than a month since 84-year-old Nancy Guthrie, the mother of "Today" show host Savannah Guthrie, went missing in an apparent kidnapping. So far, authorities have not made much progress in the case, at least publicly, but one significant and telling detail has seemingly emerged over the past several days.

As authorities continue to pore over the photos and video of the suspect at the 84-year-old's door, they have seemingly made a discovery that would indicate more than one...