When the police arrived, the shooting range instructor who had been accidentally shot by a 9-year-old girl with an Uzi was still breathing, lying on the ground and moaning as a colleague tried to stanch the bleeding from a bullet wound to his head, according to a police report released on Tuesday.

Her parents did not immediately realize what had happened after the automatic machine gun recoiled in the girl’s hands, shooting wildly on the morning of Aug. 25. The couple, visiting a recreational shooting range on a family vacation, rushed over to comfort their daughter as she complained that “the gun was too much for her and it hurt her shoulder,” according to new details of the shooting released by the Mohave County Sheriff’s Office.

Only after another instructor rushed to the victim, Charles Vacca, did the parents realize that he had been shot in the head, according to the report, which was based on statements by the parents and witnesses. At that point, the parents took the girl and her siblings — a brother and a sister — away from the scene, heading to a cafeteria upstairs, the father told deputies.

Mr. Vacca, 39, was airlifted to a hospital in Las Vegas, where he died later that night. He was the range master at the shooting range, Last Stop, in White Hills, Ariz. The police report provided a chilling portrait of a family initially unaware of what it had just witnessed, and showed how quickly a vacation outing turned to tragedy.