The case involves Thai weightlifter Supatchanin Khamhaeng, who won a gold medal in the Girls +63 kg weightlifting event at the 2018 Youth Olympic Games in Buenos Aires but later tested positive for prohibited anabolic androgenic steroids, including etiocholanolone, during an in-competition doping control. The analysis, conducted by a WADA-accredited laboratory in Rio de Janeiro, confirmed the presence of these banned substances. The athlete, a minor at the time, accepted the adverse analytical finding (AAF) and waived her right to challenge the results or request the analysis of her B sample, as per Article 7.7.1 of the IOC Anti-Doping Rules (ADR). She also signed a voluntary admission form, agreeing to the disqualification of her results and forfeiture of her medal. The case was referred to the Court of Arbitration for Sport (CAS) Anti-Doping Division (ADD) for a first-instance decision, with sole arbitrator Carol Roberts overseeing the proceedings. Despite the opportunity to respond, the athlete did not file an answer to the IOC’s request for arbitration. The IOC sought confirmation of the anti-doping rule violation and the disqualification of the athlete’s results from the 2018 Youth Olympics. The arbitrator reviewed the evidence, including the athlete’s admission, and concluded that the violation was established under Article 2.1 of the IOC ADR, which pertains to the presence of prohibited substances in an athlete’s sample. The decision emphasized that the proceedings were limited to the disqualification of the athlete’s Olympic results, leaving other potential sanctions under the International Weightlifting Federation’s anti-doping policy to separate proceedings. The Thai Amateur Wrestling Association (TAWA) submitted documents on the athlete’s behalf, including test results and an investigation report, but the IOC deemed these irrelevant to the case, as it solely concerned the automatic disqualification of her results under the IOC ADR. The arbitrator ruled in favor of the IOC, confirming the violation and imposing the automatic disqualification of the athlete’s results, including the forfeiture of her gold medal and any associated honors. The decision highlighted that the case was strictly about the disqualification of her results from the 2018 event, regardless of any other testing or investigations conducted outside this context. The ruling underscored the strict enforcement of anti-doping regulations in international sports competitions and the serious consequences for violations, including the mandatory return of medals and awards. The athlete retained the right to appeal the decision to CAS within 21 days of receiving the final award. The case serves as a clear example of the zero-tolerance approach to doping in elite sports.