During a background briefing, Colonel Kurt Kornberger, commander of the Cobra South task force, provided further details on the alert for the shooting spree in Graz:
According to the information, the perpetrator fired for no longer than 13 minutes. The alert for a possible shooting spree was raised at 10:00 a.m., and six minutes later, emergency personnel arrived at the school. According to Kornberger, patrols were in the building at 10:08 and 10:09 a.m., respectively. It was noticeably quiet. "We didn't hear any more gunshots," he said. In the foyer, Cobra officers encountered a teacher who said he had contact with the perpetrator on the third floor. The emergency personnel then discovered seriously injured and dead people in a classroom on that floor. The officers then searched the nearest rooms and found the perpetrator, who had committed suicide, in the restroom at 10:13 a.m. The first paramedics were then dispatched to the severely damaged classroom to treat the injured. At 10:17 a.m., further searches were conducted to ensure there were no other perpetrators. At 10:21 a.m., the first rescue personnel, including paramedics, arrived at the school. Meanwhile, police searched the entire building, every room, every cupboard. At 10:28 a.m., the building was cleared.