Article continues below advertisementThe man leading the investigation into Nancy Guthrie's apparent abduction is hopeful that DNA evidence discovered at the 84-year-old's Tucson, Ariz., home could lead to an arrest. In an interview with Today on Wednesday, February 18, Pima County Sheriff Chris Nanos said, "We believe we may have some DNA there that may be our suspect, but we won't know that until that DNA is separated, sorted out."Nanos added, "To me, that's more critical than any glove I found two miles away.