Tim Bethune
Tim Bethune is a retired Canadian sprinter. At the 1982 Commonwealth Games, he placed 7th in the 400m and 4th as a member of Canada's 4 × 400 metres relay. He was a member of Canada's 4 × 400 metres relay at the 1984 Summer Olympics, which placed 8th.
After he retired, Bethune admitted to using performance enhancing drugs at the Dubin Inquiry in 1989. He was never found to have taken any performance enhancing drugs while competing, and he was exonerated from any allegations that he competed while using any performance enhancing drugs.