The article reports that the executive director of World Aquatics, Brent Nowicki, has been ordered to testify in a US criminal investigation regarding 23 Chinese swimmers who failed doping tests in 2021 but were still allowed to compete and win medals at the Tokyo Olympics. The swimmers tested positive for a banned substance, trimetazidine, leading to scrutiny from international authorities. Despite China's claim that the athletes were not at fault for the positive tests due to inadvertent exposure, the US House committee has requested an investigation under a 2020 law targeting doping facilitators. The CEO of the US Anti-Doping Agency has criticized WADA and China's doping watchdog for their handling of the situation. WADA, however, maintains that they found no evidence of wrongdoing and continue to support the contamination theory. This ongoing investigation highlights the complexities of doping regulations in international sports.