Article continues below advertisementSavannah Guthrie's mother, Nancy Guthrie, was last seen by her son-in-law Tommaso Cioni before her disappearance, police said. Authorities confirmed that Nancy had dinner with her daughter Annie Guthrie and her husband on January 31. Pima County Sheriff Chris Nanos said Tommaso drove Nancy home afterward at around 9:45 p.m. and waited to ensure she safely entered her Tucson, Ariz., home before leaving, a news outlet reported on Wednesday, February 4.