Marcus Antwan Washington was suspected of robbing an individual at Knights Inn, 1850 Richland Ave., said Sgt. Jake Mahoney, of the Aiken Department of Public Safety.
Washington was arrested in Augusta and was being held in the Richmond County jail Thursday.
A second suspect, Kevin Jamell Walker, of Clearwater, was arrested Oct. 30. Walker, 23, was charged with armed robbery and possession of a firearm during a violent crime.