MITCHELL - The Madison County Sheriff’s Office is seeking the public’s help in locating Beatrice Robertson, a 45-year-old white woman who was last seen around 5 p.m. Monday, July 20, in the Mitchell area.The Madison County Sheriff’s Office said Robertson has brown hair and is 5 feet 8 inches tall and weighs 170 pounds.Authorities said she was believed to be wearing a purple short-sleeved shirt and jean shorts, along with a small purple souvenir-style backpack. She is shown in p...