Details about the health of Savannah Guthrie's mom, Nancy Guthrie, have been revealed following her disappearance. Nancy, 84, was first reported missing in Arizona on February 1. She was last seen on January 31 after having dinner with daughter Annie Guthrie and son-in-law Tommaso Cioni, who allegedly dropped her off at home after the meal. Law enforcement officials believe that Nancy was taken from her house in the middle of the night. Pima County Sheriff Chris Nanos told Us Weekly exclusively that "something unusual occurred" in Nancy's home. "We don't want anybody to lose hope.