World Anti-Doping Agency (WADA) director general David Howman has called for samples from the 2014 Winter Olympics in Sochi to be re-examined using improved testing procedures available today.
Speaking during the WADA Symposium in Lausanne, Howman claimed a retesting process should begin now, long before the expiry of a 10-year Statute of Limitations.
It follows the WADA Independent Commission highlighting concerns that the "impartiality, judgment and integrity were compromised by the surveillance of the Russian FSB within the laboratory during the Sochi Winter Olympic Games".
Commission chairman Richard Pound said in November that he "does not think we can be confident there was no manipulation of results at Sochi 2014".
The International Olympic Committee (IOC), the body responsible for all re-testing, have denied that there were any problems and claim all procedures were followed closely at Sochi 2014.
Howman speculated whether some of the samples taken in the Russian coastal resort could show traces of substances still undetectable two years ago.
"Some ought to be tested now rather than wait because of the information we know now," he said.
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