Investigators were already searching for Rodriquez Dontrey "Trey" Dunn in connection with the killing of Marquette Maurice Woods, 32.
Authorities are now also looking for Detrich D'Antonio Cooper and Justin Eric Dunn, both 19, on charges of murder, armed robbery and possession of a firearm during the commission of a crime.
Woods was discovered in a home in the 200 block of Aragon Drive with at least one gunshot wound. He was taken to Medical College of Georgia Hospital, where he later died.
Anyone with information is asked to contact the Richmond County Sheriff's Office at (706) 821-1080.