Carter's failed test may cost Bolt gold
Usain Bolt could be stripped of one of his six Olympic titles after allegations that one of his Jamaican 4x100metres team-mates with whom he won gold at the 2008 Games has tested positive for a banned substance.
The world's greatest track-and-field star is facing the devastating news that Nesta Carter is reportedly among those to fail a drugs test in the re-analysis of urine and blood samples from the 2008 Olympics in Beijing.
Carter is understood to be on the list of 31 athletes who failed those retests, which took place last month using the latest scientific techniques in order to weed out drugs cheats ahead of Rio 2016.
Carter, the sixth-fastest 100m runner of all time, ran the opening leg of the Olympic final eight years ago as Jamaica stormed to victory in a world-record 37.10sec, helping Bolt to a clean sweep of sprint titles as he burst on to the global stage at his first Games.
Unless Carter manages to clear his name, all four members of the Jamaican relay team - which also included Michael Frater and Asafa Powell - could lose their Beijing medals, ruining Bolt's perfect Olympic record.
Such a punishment would also destroy Bolt's attempt to complete an unprecedented hat-trick of 100m, 200m and 4x100m triumphs this summer in Rio. There is no suggestion that Bolt has committed any anti-doping offence.