Olga Pyleva is a former Russian biathlete who won the silver medal in the 15-kilometer individual race at the 2006 Turin Games. She's also a convicted drug user after testing positive for a banned stimulant during the games and retroactively losing her medal.
Antonio Pettigrew's suicide in 2010 followed an admission by the former American sprinter that he had used performance-enhancing drugs. Pettigrew was part of the gold medal-winning 4x400 relay team at the 2000 Sydney Olympics, and he received a two-year ban from track and field in 2008, though he was already retired and working as an assistant coach at the University of North Carolina.
Romanian gymnast Andreea Răducan tested positive for a banned substance at the 2000 Sydney Games, but the test itself was surrounded by controversy. Răducan and her coaches argued the reason the then-16-year-old tested positive for pseudoephedrine was due to an over-the-counter medication the team doctor had prescribed her to treat cold-like symptoms.