LAS VEGAS (AP) - Clark County Coroner Michael Murphy says IndyCar driver Dan Wheldon died of blunt head trauma after a spectacular 15-car wreck at the Las Vegas Motor Speedway.
    
Murphy tells The Associated Press that an autopsy Monday found the 33-year-old two-time Indianapolis 500 winner died of head injuries at the Las Vegas hospital where he was taken after Sunday's crash. Murphy ruled it an accident.
    
Wheldon was pronounced dead at 1:54 p.m. Sunday at University Medical Center in Las Vegas.
    
The race was called off after Wheldon's death.

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