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The International Olympic Committee announced Wednesday that Jamaican track star Nesta Carter was found to have tested positive for methylhexaneamine, resulting in the immediate revocation of Jamaica's gold medal in the men's 4x100-meter relay event from the 2008 Summer Olympics.
According to the announcement, Carter must return his gold medal to the IOC, as must the rest of the team, which includes Usain Bolt.
The decision represents a hit to Bolt's Olympic career, as he had previously won gold in the 100 meters, 200 meters and 4x100-meter relay in each of the 2008, 2012 and 2014 Summer Games.