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Canadian Lawyer Uncovers a Doping Scheme, and Russian Anger

He wrote a report that has prompted demands by antidoping officials for Russia to be banned from next month’s Olympic Games in Rio de Janeiro. Russian officials have called him a liar and a part of a Western plot to denigrate their nation.

Richard McLaren, a soft-spoken Canadian law professor, laid the groundwork for Russia’s potential Olympic ban with the release of his report, commissioned by the World Anti-Doping Agency, that documented how Russia’s elaborate state-sponsored doping scheme corrupted the results of the last two Olympics and tainted numerous athletic competitions.

The International Olympic Committee had said Tuesday that it was exploring the possibility of a “collective ban” on Russian athletes at the games, which begin on Aug.