A 76-year-old Barnesville cab driver is missing.Family members last heard from John H. Dixson at 10:46 a.m. Thursday when he checked in using his cellphone. He was last seen on Atlanta Street about noon Thursday. The last phone call was pinged to Barnesville. He has been neither seen nor heard from since. His cell phone has been turned off.Dixson is a black male, standing five feet, five inches tall and weighing 195 pounds. He has gray hair and brown eyes. He is diabetic and in the early stages of dementia. A Mattie’s Call has been initiated to aid in the search.Dixson was driving his familiar green 1996 Mercury Grand Marquis with Georgia tag AMI 6273.If you have information regarding Dixson’s whereabouts, call BPD at 770.358.1244.