A 25-year-old man sentenced June 10 to four consecutive life sentences, plus 275 years in prison, has already petitioned for a new trial.
An attorney for Joseph Andrew Thomas, who was convicted on multiple charges, including murder, said "legal errors" were to blame for the conviction and a transcript of the trial would prove as much.
Attorney Katherine Mason's request for a new trial was filed Monday.
Thomas' crimes encompassed five separate events in 2009, including the shooting death of 45-year-old Robert Lee Stone Jr. in the parking lot of Circle K, 1501 Gordon Highway.
Thomas is already serving a 60-year prison sentence for his role in a jail riot last year and faces other murder charges in Atlanta, according to District Attorney Ashley Wright.