Police release shocking 911 calls after Georgia school shooting

Later in the audio, an officer can be heard slightly out of breath as he says a suspect is in custody and tells the dispatcher, “Roll EMS.”

She tells the officer that emergency services have been dispatched to the school, located 50 miles east of Atlanta.

In the September 4 incident, two students and two teachers were killed and 14-year-old student Colt Gray was charged with four counts of murder.

The teenager's father, Colin Gray, was also arrested and charged with several crimes, including first-degree murder, after officers discovered he had given his son the AR-15 semi-automatic rifle used in the incident.

In another emergency call, a father calls the control center about his daughter, the school psychologist, who is hiding in a trailer with students but cannot lock the door.

“My daughter just called. She's in a trailer,” the father said. “She's trying to hide behind a desk with the child she has there with her… but she's upset because she can't lock the door.”