Article continues below advertisementA forensic expert discussed the use of electrostatic lifts in the baffling search for Nancy Guthrie, the 84-year-old mother of Today show co-host Savannah Guthrie.On an episode of "Crime Stories with Nancy Grace," Joseph Scott Morgan, a death investigator and host of the podcast "Body Bags with Joseph Scott Morgan," explained the forensic technique that is typically used to recover "dust prints" or impressions from surfaces where traditional methods like dusting might fail.