Former champion Pettigrew found dead
Former world 400 metres champion Antonio Pettigrew has been found dead, and authorities are reportedly unsure if his death was accidental or a suicide.
Pettigrew, who is survived by his wife and son, had been an assistant athletics coach at the University of North Carolina for the past four seasons.
"Although we are still learning the circumstances, we are deeply saddened to learn of Antonio's death," Dick Baddour, the school's athletic director, said of the 1991 world champion.
The 42-year-old Pettigrew, who was stripped of an Olympic gold medal after admitting to doping, was found unresponsive by friends in the back seat of his vehicle in Chatham County in central North Carolina early on Tuesday.
The officials said there were indications Pettigrew may have taken a sleep aid but were unclear if that caused a role in his death.
A spokeswoman for the state Chief Medical Examiners office told Reuters an autopsy is incomplete.
Pettigrew helped the United States win the 2000 Olympic gold medal and three world titles in the 4x400 metres relay but relinquished the Olympic gold and two of the world relay medals after admitting to using performance-enhancing substances.
He competed in one Olympics, the 2000 Sydney Games, during his long career.
A five times U.S. 400 metres champion, he was honoured in 2000 by the sport's U.S. governing body for humanitarian work.
