Nancy Guthrie sheriff says investigators may have more video evidence as they review thousands of clips

TUCSON, Ariz. — The sheriff overseeing the investigation into the suspected abduction of Nancy Guthrie has released two purported notes that may have been sent by one of her kidnappers as he urged anyone with information to come forward and appeared confident that investigators remain on the right track — revealing that investigators are reviewing "tens of thousands" of videos. Saturday marks six months since the 84-year-old mother of "Today" co-host Savannah Guthrie was taken from her longtime