Track star Marion Jones (search) filed a defamation lawsuit Wednesday against the man whose company is at the center of a federal probe into illegal steroid use among some of the nation's top athletes.

Jones is seeking $25 million in the suit against Victor Conte (search), alleging he tarnished her reputation when he went on national television to say the Olympic medalist had injected steroids.

Conte and three others connected to the Bay Area Laboratory Co-Operative (search) were indicted in February by a federal grand jury for a variety of alleged offenses, including illegally distributing steroids.

The lawsuit, filed in U.S. District Court in San Francisco, said Jones passed a lie detector test and includes a statement from her doctor saying she never used steroids. Jones won three gold medals and two bronzes during the 2000 Summer Games in Sydney, Australia.

On Dec. 3, ABC's "20/20" broadcast an interview with Conte in which he said he gave Jones performance-enhancing drugs before and after the Sydney games. He also said he watched Jones inject herself with human growth hormone, statements the suit said "are false and malicious."