The vehicle's owner heard someone breaking into his car on Alene Circle, off Meadowbrook Drive, and took a .40 caliber handgun with him to see what was going on, Langford wrote in a news release.
The juvenile fled with an unknown amount of money from inside the vehicle, and the vehicle's owner fired several shots, hitting the suspect once in the shoulder.
A second juvenile was seen leaving the area with the one who had broken into the vehicle, Langford said.
The wounded juvenile was taken to Medical College of Georgia Hospital and treated for a fracture to his left clavicle from the gunshot.
Both juveniles have been charged with entering an auto. The vehicle owner has not been charged.