Investigators in the Nancy Guthrie case in Arizona have turned to an investigative technique called genetic genealogy as they try to make the most of DNA evidence that's been collected during the search for the mother of "Today" show co-host Savannah Guthrie. The process has been used to crack some notable cases in the past decade, including identifying the so-called Golden State Killer in California who'd eluded authorities for over 40 years and the man behind the high-profile killings of four

Tag-uri: DNA