In 2012, retroactive testing on competitors' urine samples retained from the 2004 Olympic Games by the International Olympic Committee revealed that 2004 Olympic gold medalist Yuriy Bilonog of Ukraine was guilty of performance-enhancing drug use. In 2012, the IOC re-tested approximately 100 urine samples from specific events in the 2004 Games and found that four medal winners in Track and Field (both men and women, all in the throwing events) tested positive for performance-enhancing drugs.
On December 5, 2012 the IOC announced that men's shot put winner Bilonog, and women's shot put third-place finisher, Svetlana Krivelyova of Russia, re-tests showed positive for the steroid agent, Oxandrolone. Bilonog was stripped of his gold medal. The IOC, following established rules, allowed Bilonog (and the others disqualified) 21 days to appeal the ruling. Although no appeal was filed, the IOC waited another five months, to May 30, 2013, before declaring Adam Nelson the 2004 Olympic champion and awarding him the gold medal.