Transcript for Gunshot Wounds Student at Winston-Salem School
We're going to turn to another potential deadly shooting at a school. The second in less than two weeks. And this time, the alleged shooter was a student there. And once again, a hero who works at the school brought him down. Abc's linzie janis is here with more. This could have been really ugly. Reporter: Indeed. Good morning, bianna. Police tell us that shooter is behind bars this morning. His victim is recovering from injuries. We're hot. We're hearing that one's hit. Reporter: These recordings of police radios capture the chaos, as shots rang out in a crowd of hundreds of students at carver high school in north carolina. I took off. He shot twice. Reporter: They were taking part in a planned fire drill on friday. I'm going inside the school. I need officers to go inside the school. Reporter: Within minutes, the school's resource officer, tim wilson, sprang into action. He did an excellent job reacting to this situation. Reporter: Police tell abc news, the alleged shooter is a student at the school. Identified at 18-year-old christopher lamont richardson. According to the arrest report, he surrendered to the officer without incident. Authorities aren't identifying the 15-year-old victim, also a student. But say his injuries are not life-threatening. We sent a message as soon as we were alerted to this to let them know that there was an incident at the school. Reporter: Many parents racing to the school, as soon as that text came. My son texted me from class and said they're shooting on the inside of the school. The thing I did was jumped in my car and came up here. Reporter: The living nightmare comes just 11 days after a gunman terrorized an atlanta area elementary school, firing an ak-47 in the office. 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. Reporter: School bookkeeper, antoinette tuff persuading him to put down his weapon. Officials want to know how he was able to get that gun inside the school. Huge question. Thank you.
This transcript has been automatically generated and may not be 100% accurate.