 He said that at least fifteen medalists at the 2014 Winter Olympics were involved.On 19 May, WADA appointed Richard McLaren to lead an investigation into the 2014 Winter Olympics in Sochi.On 15 March 2016, The International Olympic Committee announced that they were re-analyzing stored urine samples from the 2008 and 2012 Olympics using more advanced analytical methods to detect banned substances that would have gone unnoticed at the time of competition.