The most recent case of doping in sport is Marion Jones, an northamerican athlete who won five medals at the 2000 Summer Olympics in Sydney. Last year, she admitted to having take steroids before the Olympics. The consequences have been a two-year suspension. Also, she has lost her medals and, finally, she has announced her retirement.
Another relevant case is one of the East Germany athletes and sportsmen and sportswomen. By the time of Cold War, they were forced to take banned substances to enhance their performing and, this way, show the superiority of comunism. Politics also influence sport and its bad practise. Nowadays this ex-athletes -victims, in fact- have taken their case to the court, agains a great German pharmacy company.