A Man Accused Of Robbing An Erwin Convenience Store Will Appear In Unicoi County General Sessions Court Later This Week For A Preliminary Hearing. 23 Year Old Ronnie Grindstaff, Jr., Is Charged With Aggravated Robbery And Aggravated Assault. He Allegedly Held Up The Quick Stop Market On December 31st. Police Say He Walked Into The Business, Pulled Out A Gun, And Demanded Money. Grindstaff Allegedly Threatened Two Clerks With The Weapon. He Is Scheduled To Be In Court On Thursday.