 Bolt 's record @-@ setting runs caused commentators not only to praise his achievements but also to speculate about his potential to become one of the most successful sprinters ever . Critics hailed his Olympic success as a new beginning for a sport that had long suffered through high @-@ profile drug scandals . The previous six years had seen the BALCO scandal , Tim Montgomery and Justin Gatlin stripped of their 100 m world records , and Marion Jones returning three Olympic gold medals . All three sprinters were disqualified from athletics after drugs tests detected banned substances in their systems . Bolt 's record @-@ breaking performances caused suspicion among some commentators , including Victor Conte , and the lack of an independent Caribbean anti @-@ doping federation raised more concerns . The accusations of drug use were vehemently rejected by Glen Mills ( Bolt 's coach ) and Herb Elliott ( the Jamaican athletics team doctor ) . Elliott , a member of the IAAF anti @-@ doping commission , urged those concerned about the issue to " come down and see our programme , come down and see our testing , we have nothing to hide " . Mills had been equally ardent that Bolt was a clean athlete , declaring to the Jamaica Gleaner : " We will test any time , any day , any part of the body ... [ he ] doesn 't even like to take vitamins " . Bolt stated that he had been tested four times prior to the Olympics , and all had tested negative for banned substances . He also welcomed anti @-@ doping authorities to test him to prove that he was clean , stating , " We work hard and we perform well and we know we 're clean " . 
