DEKALB COUNTY, Ga. — The family of 18-year-old Ervin Jefferson is grieving, aching for police to investigate the two men who shot and killed Ervin outside the family’s home Saturday night. Police are saying that the killers are two private security guards. Ervin’s mother is insisting her son was unarmed. She wants the killers arrested and prosecuted. 11Alive News has not yet been able to contact the security guards for their descriptions of what happened. “Why do you think your son was shot?” asked 11Alive’s Jon Shirek. “He was trying to protect us,” said Ervin’s mother, Candy Grimes. Family and friends of Ervin Jefferson, who himself was already the father of a baby girl, said Ervin was trying to protect his family late Saturday night. He ran outside their home on Pleasantwood Drive, off of I-20 and Wesley Chapel Road just outside the Perimeter. He was unarmed, they said, as he ran toward a crowd of people who had driven up in at least two cars, threatening his sister. “We heard gunshots,” Candy Grimes said through her tears. “I seen the dude in the green shirt shoot my son. I seen the guy, he had two hands, and he shot my son.” Grimes said that as soon as her son was shot, someone else drove a car into him. “By the time I got down there, the car was on top of my son. He was literally under the car.” Ervin suffered a gunshot wound to the torso. He was transported to an area hospital, where he was pronounced dead. DeKalb County police confirmed Sunday that two men did kill Ervin Jefferson: two private security guards from the Village at Wesley Chapel Apartments, just down the street from the family’s home. Police said the men had left the complex to investigate the disturbance outside Ervin’s home, which Candy Grimes said is what her son was doing — trying to intervene — when the two men killed him. “One of them shot him, and one of them ran over him. It’s two of y’all. He’s little. He little. Why y’all just didn’t beat him up, jump on him, why you just didn’t fight him, why you have to shoot him? I just want justice. That’s all I want, I just want justice. He was trying to protect us.” No one with DeKalb County Police was available Sunday night to say if investigators had arrested and charged anyone.