Authorities Turn to Genetic Genealogy in Nancy Guthrie Case

Authorities are announcing that DNA found in Nancy Guthrie's home will be analyzed using genetic genealogy. It comes as investigators are canvassing gun stores in Tucson, in hopes of identifying the armed suspect who had an unusual holster. Meanwhile, sources familiar with the case tell NBC News that since Nancy's disappearance, law enforcement has been in touch with officials on both sides of the border. NBC’s Liz Kreutz reports for TODAY.