News Curator: Dirt-track racer hit by Tony Stewart died of 'massive blunt trauma'

Kevin Ward Jr., a New York sprint car driver who was killed Saturday night after an on-track incident with NASCAR driver Tony Stewart, died of "massive blunt trauma," authorities said Monday

Sheriff Philip C. Povero told reporters that the Ontario County medical examiner finished an autopsy on the 20-year-old driver on Monday.

Povero also said investigators were reviewing a second video of the incident in which Stewart's car struck Ward as the young driver stood on the dirt track after a spin out. Ward died of his injuries before an ambulance arrived at a hospital.

Read story here: CNN.