Bolt loses relay Olympic gold after Jamaica's Carter tests positive

Jamaica's Usain Bolt has lost one of his nine Olympic gold medals and his perfect triple treble of Games' sprint victories after team mate Nesta Carter was found guilty of doping at the 2008 Beijing Olympics. Carter was found to have taken the prohibited substance methylhexaneamine, the International Olympic Committee (IOC) said on Wednesday, meaning Jamaica's 4x100 metres relay team must give back their gold medals.