Ojego Ofieo was arrested and charged with felony murder and aggravated assault on Monday, according to DeKalb County police.
Another person, who is not in custody yet, has also been identified and is facing three counts of murder, officers said.
The Brannon Hill Condominiums -- where the shooting occurred -- have been consistently plagued by crime and structural damage issues over the last two decades, and Sunday night, it was the site of a deadly shooting.
Authorities said they responded to the units around 8 p.m. on Sunday to find five people with gunshot wounds. Three were pronounced dead and two were taken to the hospital. A third person arrived at the hospital later on.
The DeKalb County Medical Examiner's Office has since identified the victims as 21-year-old Masi Maybay and 23-year-old Jory Fasse, adding examiners are working to still identify the third victim.
A resident told 11 Alive the shooting started in front of her building in the parking lot. She said a group of people then ran into her building into the nearby unit and the shots continued. Blood, shell casings, and bullet holes could still be seen Monday.
Another witness said she heard gunfire for a few minutes.
“I heard 20 to 30-gunshots like automatic gunfire...the gun shots sounded like they were on a mission, they accomplished their mission and drove off," said Chemeka Charactar.
DeKalb County Commissioner Ted Terry, who represents District 6 where the Brannon Hill complex is located, said he believes Sunday night's shooting could have been prevented.
He said he's been asking the county to address the dangerous conditions at the complex for the last six years, and that he feels his concerns about the complex being a threat to public safety have been ignored for too long.
The complex has had multiple fires which have left many buildings condemned. It has also been allegedly used as a dumping ground by private businesses.
Back in 2016, Brannon Hill was called the worst community in America by the Deen Media Center for its high crime, unsafe structures, and mounting debris.
Meanwhile, police have still not released a motive in the case. Anyone with additional information is urged to call the DeKalb County Homicide Assault Unit at 770-724-7850.