Authorities are pleading with the public for help in finding 84-year-old Nancy Guthrie.  She was last seen late Saturday at her Arizona home.  After initially investigating the case as a "missing, vulnerable adult," the sheriff now says there is a crime scene at her home and he believes she was abducted.  He also said they haven't dismissed the theory that her disappearance is connected to her daughter, Today Show co-anchor, Savannah Guthrie.   

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