Clayton County police Officer Phong Nguyen says the Bureau of Alcohol, Tobacco, Firearms and Explosives will try to obtain leads from the weapon, a Marlin .22-caliber rifle.
The Atlanta Journal-Constitution reports that more than 50 officers spent Wednesday afternoon going door-to-door in the neighborhood where witnesses saw the man aiming at the bus Monday morning.
The man fled when witnesses confronted him. Authorities say a neighbor chased him, but stopped when the man used a second gun and shot at him.
Police recovered the rifle and a notebook filled with bus numbers.
