A medical examiner's report says a metro-Atlanta man who was killed by a police officer's bullet was shot in the back, adding a new twist to a case in which police say the man was driving a car toward officers when it happened.

An autopsy on the body of 23-year-old Nicholas Thomas was conducted by the Cobb County medical examiner's office March 25, the day after Thomas was killed. The report was certified by the medical examiner on Tuesday.

Police have said Smyrna police Sgt. Kenneth Owens shot Thomas as he drove a Maserati toward officers who were trying to serve him with a parole violation warrant.

The medical examiner's report says Thomas died from a gunshot wound after a bullet entered his upper back on the right side.