Jamaican sprinter Steve Mullings will miss the Olympics after twice testing positive for testosterone.
Mullings can defend himself at a hearing next week, but is suspended by Jamaica pending that hearing.
With the start of the Olympics only a week away, the sprinter has no chance of taking his place.
Mullings tested positive for the banned substance after winning the 200m at the national trials in June and failed a second test last month.
Mullings' name had been kept confidential during the testing process, with Jamaican Olympic Association president Mike Fennell saying the athlete had a right to request a second test.
Following next week's hearing, Jamaican athletics officials will submit a report to athletics ruling body the IAAF.
They will then decide whether to suspend Mullings for two years under rules laid down by the World Anti Doping Agency.