"We have sent a request for legal assistance to US authorities, so that they question [Rodchenkov]," Vladimir Markin told Russia's Vesti FM radio.
On May 12, The New York Times newspaper quoted Rodchenkov, as saying that at least 15 Russian athletes-medal winners at the Winter Olympics 2014 in Sochi were part of a state-run doping program, aimed at country's dominance at the Games.
On June 18, Markin said that Russia’s Investigative Committee had launched a criminal inquiry on suspicion of abuse of power by Rodchenkov.
Russia’s Investigative Committee has also opened an inquiry against several senior officials at the All-Russia Athletics Federation (ARAF) in connection with the suspected abuse of office. Criminal cases against them were launched earlier in June.