- American star 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, and she will not challenge for the Olympic 100m title in Tokyo.
Jamaica’s Gleaner newspaper was first to report the news on Thursday night. On Friday, Richardson appeared on NBC’s Today show and offered an apology.
Related: Sha’Carri Richardson may be the most exciting sprint star since Usain Bolt
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