There's been a major update in the search for Savannah Guthrie's mother. As we've been following, authorities are frantically searching for Nancy Guthrie after she was reported missing on Sunday afternoon in Arizona. The 84-year-old was last seen by her family on Saturday night and is said to be cognitively healthy - meaning, she likely didn't just get confused and wander off. Law enforcement already warned that initial signs inside her home pointed to a "grave concern" for her safety, but now there's even more.