Police say 23-year-old Joseph Thomas is charged with the shooting of 22-year-old Greggory Savelio on Aug. 22.
DeKalb County Police spokesman Jason Gagnon said Tuesday that Savelio had stopped at a gas station about 6 p.m. when gunfire erupted.
Savelio was studying business marketing at Westwood College while working full-time. He was scheduled to graduate in 2010. His mother says he attended Westwood College in Chicago but transferred to the Atlanta campus so he could be closer to his father, who lives in the area.
The Richmond County Sheriff's Office says Thomas is being held on an unrelated murder charge.
Thomas, of the 100 block of Calvary Drive, was arrested on September 15 and charged with murder, armed robbery, two counts of possession of a firearm during the commission of a crime and two counts of possession of a firearm by a convicted felon, according to Richmond County jail records.
Robert Lee Stone Jr. was shot to death in the parking lot of the Circle K at 1501 Gordon Highway about 9:30 p.m. on September 10, authorities said.
Thomas was also charged with the armed robbery of a cable installation man in the 2100 block of Second Avenue just hours before the September murder took place, Richmond County sheriff's Lt. Scott Peebles said.
In 2004, Thomas was sentenced to five years probation on a cocaine possession charge in Richmond County when he was 18. The probation was revoked in 2005, and he was later paroled to DeKalb Co. in August of 2007.