The claim
She had never used performance-enhancing drugs.
Made in: Public statements and grand jury testimony
The proof
Jones testified before a federal grand jury that she had never used steroids. She later pleaded guilty to obstruction of justice for lying to the grand jury about her use of performance-enhancing drugs. She was sentenced to six months in prison.
The record
United States v. Jones — U.S. District Court for the Southern District of Texas · No. 4:06-cr-00712
Outcome: Pleaded guilty to obstruction of justice (October 2007); sentenced to six months in prison; stripped of all five Olympic medals
The person admitted the facts under oath in open court, before a judge, to end a criminal case. The strongest record possible: self-incrimination.
Jones won three gold and two bronze medals at the 2000 Sydney Olympics, all later stripped. She was one of the highest-profile athletes to be caught in the BALCO scandal.