Nancy Guthrie, the 84-year-old mother of Today co-host Savannah Guthrie's daughter, has been missing for over a month. She was last seen on Jan. 31, after her family dropped her off at her home in Arizona. The Pima County Sheriff's Department (PCSD) launched an urgent search for her after she failed to show up for a church service the next day. The missing persons search is now being treated as a crime due to a "concerning" scene at her residence. The FBI has also been involved in the search. A local sheriff in Arizona has confirmed that investigators have found "biological DNA" evidence at Nancy's home.