American sprinter Erriyon Knighton, embroiled in a doping controversy, finished fourth in the men's 200-meter final at the Paris Olympics on Thursday. However, his abrupt departure from the media zone without taking interviews has only fueled further suspicion regarding his eligibility to compete.

Knighton tested positive for the banned steroid trenbolone during an out-of-competition test on March 26. The United States Anti-Doping Agency (USADA) opted not to impose a suspension, attributing the positive result to contaminated meat. This decision allowed Knighton to compete in the Paris Olympics qualifiers, a move that has sparked widespread concern.

China's Anti-Doping Agency (CHINADA) publicly questioned USADA's handling of the case, calling for an independent investigation into what it described as a serious breach of the World Anti-Doping Code and a potential cover-up of anti-doping violations.

When asked about Knighton's whereabouts, a U.S. team staff member informed reporters that Knighton had already left and did not stop for interviews. Fellow journalists reported that Knighton hurried past the American TV reporters' interview area without saying a word.

"Knighton's silence is particularly striking given the ongoing scrutiny of doping practices," commented one pundit. "Questions remain as to why the typically outspoken Knighton has chosen not to address the media, leaving the doping controversy surrounding him unresolved in the public eye."