Track star Marion Jones has acknowledged using steroids as she prepared for the 2000 Summer Games in Sydney and plans to plead guilty tomorrow in New York to two counts of lying to federal agents about her drug use and an unrelated financial matter, according to a letter Jones sent to close family and friends.

Jones, who won five medals at the Sydney Olympics, said she took the steroid known as "the clear" for two years beginning in 1999, according to the letter, which was read to The Washington Post by a person who had been given a copy. A person familiar with Jones's legal situation who requested anonymity confirmed the relevant facts that were described in the letter.

Marion Jones, who won five medals at the Sydney Olympics, says she took the steroid known as "the clear" for two years beginning in 1999, according to a letter Jones sent to close family and friends. (Arne Dedert - AFP)