A Sullivan County Sheriff’s Captain Remains On Paid Administrative Leave Pending The Outcome Of A Domestic Violence Accusation. The Kingsport Police Department Was Called In To Investigating The Allegations Against Captain Mark Ducker. According To The Report, No One Was Charged Due To Conflicting Statements, No Witnesses And No Physical Evidence Of Injury To Either Party. The Sheriff’s Office Is Conducting An Internal Investigation Against Ducker As Well As The District Attorney General’s Office.