Doping scandal in Russian football?

Many Russian athletes are in danger of missing out next month's summer Olympic Games in Rio de Janeiro and lately WADA (World Anti-Doping Agency) has accused that in Russian football exist also doping irregularities. The agency indict Russia that its Premier league have 'at least one' case of doping in the championship and that cover up was (surprisingly) on a foreign player. And the main 'guilty' person who knew 'everything' but did not report irregularities in the sport is the country's Minister of sport and Russian FA president Vitaly Mutko.
Because of this serious allegations FIFA has said that it will have a look into the case of whether there was violations from the top football official.