A Richmond County jury found Irving Folston guilty of murder Thursday for ordering the death of Antonio President in May 2008.
Folston was sentenced to life in prison plus 30 years, according to District Attorney Ashley Wright.
He had been on trial since Monday afternoon.
An eyewitness testified this week that on the day of the slaying, Folston gave his co-defendant, Levaughn Sloans, a handgun and told him to go shoot President, who was standing at a liquor store at the intersection of Wheeless and Milledgeville roads.
Sloans shot President, then fled, the witness testified.
Sloans was sentenced to life in prison plus 35 years in September.
Prosecutors said Folston ordered President's death because several months before the shooting, President robbed Folston of $1,000 and about a gram of cocaine.
Folston testified that he had never seen that prosecution witness in his apartment the day of the shooting.