Article continues below advertisementThe Guthrie family has officially asked for police presence at Nancy Guthrie's home in Tucson, Ariz., amid ongoing efforts to locate the missing 84-year-old. The Pima County Sheriff's Department confirmed their commitment to security at the residence following the family's request.Article continues below advertisementSource: @savannahguthrie/InstagramThe Guthrie family requested police presence at Nancy's home.