Nancy Guthrie disappearance: Former FBI agent reveals amount of time likely needed for advanced DNA testing

TUCSON, Ariz. – Advanced DNA testing which combines crime scene DNA analysis and information from commercial genealogy databases could take weeks or months to process after the DNA found on a glove near Nancy Guthrie's home didn't produce a match in an FBI database, according to an expert. 

During an interview with Fox News on Tuesday, Pima County Sheriff Chris Nanos said that DNA recovered from Guthrie's home, as well as a glove found near the house, wasn't a match for any records found...