A Hawkins County Man Facing Vehicular Homicide Charges Has Died Of Natural Causes. 76 Year Old Roby Calhoun Was Charged With Aggravated Assault With His Vehicle Following An Incident That Happened Last August In Church Hill. He Reportedly Had Traffic Offenses Dating Back Decades, Including An Involuntary Manslaughter Conviction. Calhoun Had Been Scheduled To Appear In Court Next Month.