Now, we turn to the school shooting in georgia. Students returning to class this morning, as we hear for the first time the remarkable 911 call from that brave school bookkeeper, who talked the gunman... See More
Now, we turn to the school shooting in georgia. Students returning to class this morning, as we hear for the first time the remarkable 911 call from that brave school bookkeeper, who talked the gunman down. And then, got him to give up. Abc's steve osunsami is in decatur this morning with the story. Steve, what amazing grace under pressure. Reporter: Good morning, lara. She is the type of educator you want watching your children. The kids are coming back this morning. 800 students who were forced to evacuate the school. Those 911 tapes will clearly be used as evidence against a young man accused of holding this school hostage. He said to tell them to back off. He don't want the kids. He wants the police. So, back off. AND WHAT ELSE, SIR?u He said he don't care if he die. He don't have nothing to live for. Reporter: Georgia police releasing the call for help from the bookkeeper in the school's front office. Ooh, he just went outside and started shooting. Reporter: Police say the young man in the background, shooting and giving orders is 20-year-old michael brandon hill. The woman following them is bookkeeper antoinette tuff. He wants me to go on the intercom and let everybody know he's sorry. Okay? Everybody, this is still a continuous lockdown. Reporter: She acted brilliantly. I can help you. Let me talk to them and let's see if we can work it out so you don't have to go away with them for a long time. It's going to be all right, sweetheart. I just want you to know that i love you. And I'm proud of you. That's a good thing that you're just giving up. Reporter: As tuff told george exclusively on "gma," she promised the shooter he would be okay if he surrendered. If he go ahead and surrendered, since he didn't hurt anyone, that I would stay there with him until they came. And that it was going to be okay. That we were going to get out safely. Reporter: When he put the guns down, police came rushing in. They're coming. So, just hold on, michael. Go ahead and lay down. Stay on the ground. Get on the ground. Do not move. I've never been so scared in any day of my life. You did great. You did great. Oh, jesus. Oh, god. Reporter: Police say hill was carrying an ak-47 he took from a friend's home. And say he snapped this photo before leaving for the school. They say he was carrying 500 rounds of ammunition. Was the potential there to have another sandy hook? Absolutely. Reporter: These police reports show he's been in trouble before. Arrested for threatening to shoot his own brother in the head last december. He was given three years probation. He has a history of poor mental health, according to his family. And he has a court appearance scheduled any day now. Lara? All right. Steve osunsami in decatur. That's remarkable to hear. So scary. And able to say I love you to get it done. A hostage negotiator. Amy robach in with the rest
This transcript has been automatically generated and may not be 100% accurate.