US Sprinter Sha’Carri Richardson May Miss Olympics After Testing Positive for Cannabis.br US Sprinter Sha’Carri Richardson May Miss Olympics After Testing Positive for Cannabis.br A source told Reuters that Richardson, who won the 100 meters at the U.S. Olympic Track and Field Trials on June 19, tested positive for cannabis at the event.br A source told Reuters that Richardson, who won the 100 meters at the U.S. Olympic Track and Field Trials on June 19, tested positive for cannabis at the event.br This would reportedly invalidate her achievement and may lead to a suspension of one month or longer from the sport.br According to Reuters, Richardson is br not currently scheduled to participate br in the Diamond League events.br Richardson took br to Twitter on br July 1 to post a br cryptic tweet. .br Though marijuana is legal in Oregon, where the U.S. Olympic Track and Field Trials were held, .br USA Track and Field follows guidelines set forth by the World Anti-Doping Agency, which bans cannabis.