Retired FBI supervisory agent James Gagliano joins 'Fox & Friends Weekend' to break down how DNA is being used in the search for Nancy Guthrie. Don’t just watch Fox News—be part of it. Become a Fox News Patriot today. https://youtube.com/foxnews/join Subscribe to Fox News: https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/ Download the Fox News app: https://foxnews.onelink.me/xLDS/cd5yhg3o FOX News Channel (FNC) is a

Tag-uri: DNA