Forensic DNA consultant Suzanna Ryan explains the process that takes place when testing DNA in a case like Nancy Guthrie's on 'The Will Cain Show.'

DNA from gloves found a few miles from the Arizona home of Nancy Guthrie did not match any entries in a national database, authorities said Tuesday, the 17th day of her disappearance.

A glove containing DNA evidence that was recovered roughly 2 miles from Guthrie’s home appears consistent with a glove worn by a person seen in a doorbell camera video from the morning she disappeared...