India, March 15 -- Nancy Guthrie, the mother of 'Today' show host Savannah Guthrie, has been missing since January 31. While authorities believe that the 84-year-old was kidnapped from her Tucson home, no suspects have been identified yet. Now, forensic experts are pointing to potential investigative avenues that could help authorities identify the person responsible.

During an interview with NewsNation journalist Brian Entin, forensic science professor April Stonehouse outlined the types of evidence she believes investigators should closely examine as the search continues.

One piece of evidence that particularly stood out to Stonehouse was a flashlight seen in surveillance footage from the night Guthrie vanished. Doorbell camera footag...