A Sullivan County Grand Jury Has Indicted A Kingsport Man For Allegedly Holding Up A City Convenience Store. 21 Year Old Devon Williams Is Charged With Aggravated Robbery And Attempted Aggravated Robbery. He’s Accused Of Robbing The Rock Springs Mart January 8th And Trying To Rob Fast Lane On Sullivan Garden’s Parkway The Same Night. Williams Is Expected To Appear In Sullivan County Criminal Court Soon For An Arraignment And Trial Date Set.