American runner Debbie Dunn has withdrawn from the Olympics after failing a drugs test at the US trials.
US athlete pulls out of Olympics following positive sample
Debbie Dunn has withdrawn from the Olympics after failing a drugs test at the US trials.
The 400metre runner's sample was found to have an elevated level of testosterone after finishing fourth in the final.
The 34-year-old was due to be part of the US team as they look to win a fifth successive 4x400m relay gold medal, but has now decided to withdraw to concentrate on clearing her name.
She said: "I have been informed by the US Anti-Doping Agency that a sample I gave at the US Olympic Trials contains an elevated testosterone/epitestosterone level.
Withdrawing
"While I work with USADA to resolve this matter, I am withdrawing from my relay pool position for the 2012 Olympic Games.
"I do not want any issue like this to distract from my team-mates' focus for the biggest meet of their lives. I wish Team USA the best in London as I work toward resolving this matter."
The USADA chief executive Travis Tygart added: "We are currently processing the B sample, and as in all cases all athletes are innocent until and unless proven otherwise through the established full, fair legal process which was approved by athletes, the US Olympic Committee, and all Olympic sports organisations."
Facts
"USADA appreciates Ms. Dunn voluntarily removing herself from the Olympic team while the full facts surrounding her elevated T/E ratio and adverse carbon isotope ratio analysis (CIR) are evaluated"
Should Dunn return a positive 'B' sample she could accept sanction or take her case to arbitration.
