The International Olympic Committee has opened a formal investigation into a doping case that could lead to the stripping of gold medals from a US women's relay team at the 2004 Athens Olympics.
The IOC board has set up a three-man panel to investigate the case of Crystal Cox, who ran in the preliminaries of the winning 4 by 400m team in Athens.
The US Anti-Doping Agency announced late last month that Cox had admitted to using anabolic steroids and accepted a four-year suspension and disqualification of her results from 2001 to 2004.
