Sgt. Adrion Bell of the DeKalb County Sheriff's Office says officers are looking for Antione Willis Jr. in the fatal shooting in January of 18-year-old Marcus Holloway.
The victim was a senior at Southwest DeKalb High School.
Bell says authorities were told the shooting was in retaliation for a slashed tire on a stolen vehicle that some gang members had been driving.
Bell says Willis has been identified as the leader of an obscure gang. He says Willis and 19-year-old Jaqwanta Grimes, who is already in custody, will be charged in the case.