The two were taken into custody with the help of a police dog.
Police thereafter proceeded to the KwaMakutha area whey they arrested a third suspect, who was also found in possession of an unlicensed firearm and ammunition.
The incident occurred around 12:15 p.m. Monday at Kim's Gift Shop in the Copaco Shopping Plaza, 297 Cottage Grove Road, according to police. Police said the suspect, later identified as Graves, entered the store, reportedly threatened the cashier and fled with cash from the register. Per the DeKalb County Police Department, the unnamed suspect shot Diggs, who was asleep in his mother's auto, after missing his intended target.
During all of the robberies, the suspect was armed with a gun.
Topsham police have released a sketch of the suspect they believe robbed a tanning salon last week.
CrimeStoppers is offering a $1,000 reward for the suspect's identity and arrest. Graves reportedly displayed a weapon and ordered the woman out of her vehicle, police said.
The other suspect is described as a black man with a dark complexion.
If you have any information regarding these crimes, please immediately call the Police or CrimeStoppers using the 24-hour tip line at 215-STOP.