The Austrian Anti-Doping Legal Committee said Thursday that Duerr was found guilty of blood doping, the possession and use of banned substances as well as passing them on to other athletes. Duerr was the whistleblower for Operation-Aderlass, the criminal investigation into an international doping ring that was revealed by raids at the Nordic skiing world championships in Seefeld, Austria in February. Prosecutors expected 21 athletes from five different sports to be involved.
Five years ago, Duerr was banned for two years after being sent home from the Sochi Games for failing a doping test. He returned to the circuit in an attempt to qualify for the Nordic worlds in Austria, but all his results since February 2014 have now been declared invalid.
Duerr's former teammates Max Hauke and Dominik Baldauf and cyclists Georg Preidler and Stefan Denifl have all been banned for four years for their alleged involvement in the doping ring.
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