Article continues below advertisementA forensic DNA expert believes the person who took Nancy Guthrie, the 84-year-old mother of Today show co-host Savannah Guthrie, left enough DNA in her home that will eventually lead to solving the baffling case.Forensic DNA analyst Suzanna Ryan, Laboratory Director at Pure Gold Forensics, explained on "The Megyn Kelly Show" how the case might be solved through genetic genealogy, the combination of DNA testing with traditional, record-based genealogy to determine biological relationships and ancestral origins.