A Roane County man is facing charges of aggravated assault and robbery. Deputies say 19-year-old Austin Blake Helton of Harriman turned himself into the Roane County Detention Facility last night (Tuesday, December 12, 2017). Details of the crimes were not immediately available but the warrants were taken out by the Harriman Police Department. Helton was processed at the Roane County jail and initially placed under $7,500 bond.