Police say a third man has been arrested for his role in a large disturbance in Dubuque earlier this month, during which shots were fired. 28 year old Devonte Ellison Sr. was arrested Sunday on a charge of possession of marijuana and a warrant charging participation in a riot. The riot charge stems from an April 9th incident, and Ellison is the third person arrested in connection with the disturbance. According to reports, 37 year old Romell Scott of Dubuque and 30 year old Marvin Brantley have also been arrested and charged. Police responded to a report of shots fired at 10:45 p.m. April 9th in the 2100 block of Central Avenue. Arriving officers found three spent 9mm shell casings in the rear parking lot of Knicker’s Saloon on Central Avenue.