Olympic champion Marion Jones called for a public hearing on Wednesday after reports that she may have violated doping rules. This follows a letter Jones received from the US Anti-Doping Agency seeking information following the investigation into the Balco laboratory in California. The United States Anti-Doping Agency (USADA) is investigating Jones for possible doping violations, but Jones maintains that the agency has no evidence to base their case. Jones met with USADA officials last month to discuss possible drug evidence against her, and received a letter from the agency last week asking follow-up questions. Jones won an unprecedented five athletics medals at the 2000 Sydney Olympics and has hinted she may try to match that mark at the Athens Games. She repeatedly has denied using performance-enhancing drugs and has vowed to fight any USADA charges.