New Jersey State Police are searching for answers Thursday as to what caused the crash that killed NASCAR driver Jason Leffler on Wednesday night.
Leffler, 37, was killed at New Jersey's Bridgeport Speedway, a dirt track about 20 miles southwest of Philadelphia. Local authorities have not examined his body, though ESPN reports that will be done Friday.
During a preliminary heat, Leffler's car left the banked dirt track and flipped several times down the front straightaway, according to the South Jersey Times. Emergency crews were called to the track around 8:30 p.m. ET. Leffler was unconscious and was taken to a Camden, N.J., hospital. He was pronounced dead around 9 p.m., according to the Los Angeles Times.
Leffler was a Long Beach, Calif., native and is survived by his 5-year-old son, Charlie Dean.
"Sitting here in disbelief. ... All I can think about is Charlie," NASCAR racer Elliott Sadler said.
Leffler made 73 starts in the Sprint Cup Series. On Sunday, he finished last at Pocono in his only Sprint Cup start of the year.
He was a two-time winner on the Nationwide circuit.
Leffler also had raced and finished the Indy 500 and the Daytona 500.