Hajo Seppelt: German investigative journalist on the World Anti-Doping Agency's independent review into Tokyo Olympics doping scandal

Questions are being raised as the World Anti-Doping Agency launches a review into a doping scandal at the Tokyo Olympics.

WADA has come under fire for its handling over allowing Chinese swimmers who tested positive for a banned heart medication to compete.

German investigative journalist Hajo Seppelt joined Piney to discuss the case.

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