Authorities are conducting DNA testing on a black glove found near Nancy Guthrie’s home weeks after she went missing. The glove “appears to match the gloves of the subject in the surveillance video,” that was taken outside Guthrie’s home the day she disappeared, the FBI said in a statement on Sunday. Investigators are going into week three in the search for Guthrie, the mother of “Today” host Savannah Guthrie. Sheriff Chris Nanos of Pima County, Arizona, tells CBS News that investigators believe the clothing and face mask worn by the suspect were purchased at Walmart. CBS News’ Anna Schecter breaks down what we know about the evidence and where it might possibly lead investigators. #tuscon #arizona #crime