Marion Jones admitted to doping before the 2000 Olympics in a recent letter to close family and friends, The Washington Post reported Thursday.
Jones, a triple gold medalist in Sydney, said she took "the clear" for two years, beginning in 1999, and that she got it from former coach Trevor Graham, the newspaper reported. Graham told her it was flaxseed oil.
"The clear" is a performance-enhancing drug linked to the Bay Area Laboratory Co-Operative (BALCO), the lab at the center of a US government doping investigation. Until now, Jones had steadfastly denied she ever took any kind of performance-enhancing drugs.