An autopsy revealed that NASCAR driver Jason Leffler died from a blunt force neck injury when his car hit a wall during an event in New Jersey on Wednesday night, according to USA Today.
The cause of death was ruled by the Delaware County (Pa.) Medical Examiner. However, the cause of the accident is still being investigated by the New Jersey State Police. The crash took place at the Bridgeport Speedway dirt track in New Jersey.
Leffler was driving a sprint car at the speedway's "Night of Wings" on Wednesday night when it flipped on the track's front stretch and hit a wall. He was extracted from the wreck by rescue personnel and airlifted from the track in a helicopter.
Leffler, 37, drove on the Sprint Cup and Nationwide Series circuits.