The IOC has opened an investigation into the Italian race walker expelled from the London Games for doping and could retest the 2008 gold medalist's samples from Beijing.
Two Olympic officials familiar with the case tell The Associated Press that the IOC launched a disciplinary case Thursday against Alex Schwazer, who was removed from the team by the Italian Olympic Committee on Monday after testing positive for EPO in a pre-competition test.
The officials spoke on condition of anonymity because the probe hasn't been officially announced.
Schwazer, who won the 50-kilometre race walk at the 2008 Beijing Games, has insisted he was clean at the time.
The IOC is now considering retesting his Beijing samples. Previous retroactive tests of Beijing samples caught five athletes for use of blood-booster CERA.