- American star reportedly tested positive after US Olympic trials
- Richardson ran 10.86sec to establish herself as gold contender
- Texan has been hailed as most exciting sprinter since Usain Bolt
American sprinter Sha’Carri Richardson has tested positive for cannabis, sources have told Reuters, and she is unlikely to get the chance to challenge for the Olympic 100m title in Tokyo later this month.
Jamaica’s Gleaner newspaper was first to report the news on Thursday night, saying Richardson tested positive for an unspecified prohibited substance.
