PHOTOS: 5 famous Olympic cheaters

Canadian Ben Johnson tested positive for an anabolic steroid after winning Gold at the 1988 Olympics in Seoul, Korea, for the 100m dash. Credit: Leo Mason-US PRESSWIRE

China's Yu Yang (l) announced she was quitting badminton competition after being disqualified with her doubles partner Wang Xiaoli for "not using one's best efforts to win a match" at the London 2012 Summer Olympics. Photo courtesy: AP Graphics Bank.

Boris Onischenko of the Soviet Union , rigged his fencing epee to falsely register a touch when he touch a button in the handle at the 1976 Montreal Games. Photo courtesty Getty Images.

Marion Jones, American sprinter admitted in 2007 she had used steroids prior to the 2000 Sydney Games where she captured three gold and two bronze medals. Mandatory Credit: Kirby Lee/Image of Sport-US PRESSWIRE

Swimmer Cameron van der Burgh of the South African team is being scrutinized for doing two extra dolphin kicks than allowed in 100m breaststroke competition in London. Mandatory Credit: Kyle Terada-USA TODAY Sports