Patrick Smith/Getty ImagesAfter failing a drug test, Sha'Carri Richardson's trip to Tokyo Olympics is now in doubt.Tyler Dragon, Cincinnati Enquirer's reporter, reports that Richardson will be suspended for 30 days after she tested positive for marijuana. After running a 10.86 final in the U.S. Olympic Trials, Richardson qualified for the 2020 games in 100-meter sprint.Dallas, Texas 21-year old, ran the fastest 100-meter time ever recorded. He set a personal record of 10.72 in April.Andre Lowe from Jamaica Gleaner stated that Richardson's Olympic Trials sample contained "traces" of the substance. However, this doesn't necessarily mean Richardson will be suspended immediately.The World Anti-Doping Agency's banned substance list includes synthetic and natural cannabinoids, with the exception of cannabidiol. However, it specifies that those substances are prohibited during competition. Lowe pointed out that if an athlete can show they didn't use the substance during trials, they could only face a three month ban. This could be reduced if they submit to an approved treatment plan.Jenna Prandini, who placed fourth in 100-meter will replace Richardson if Richardson is unable to compete for the Olympic team.According to USTAF guidelines, the final decision rests with USA Anti-Doping Agency.If a sample is positive, USADA handles all aspects of the discipline process. USADA will notify athletes if the positive sample was taken in an international competition that USATF sanctioned. USATF will notify USATF if the positive sample was taken in an IAAF-sanctioned contest. USATF will also notify USADA.It is not clear when or how soon an announcement from the USTAF could be made.