Pettigrew lost gold medal after doping scandal
                                
                                
                                    (Newser) -
                                    Former world champion sprinter Antonio Pettigrew has been found dead in the backseat of his car in North Carolina. Pettigrew, 42, was part of the American 4x400-meter relay squad that won gold at the 2000 Sydney Olympics, only be be stripped of their medals after Pettigrew  confessed to being part...