The appellant trainer appealed a nine-month suspension and $5,000 fine imposed after his horse tested positive for Oxycodone.
The official sample consisted of three blood vials.
While one vial tested positive for trace amounts of the drug, the other two vials tested negative.
The panel accepted expert evidence that it is physiologically impossible for a continuous blood draw to distribute a drug into only one vial, concluding the single positive vial must have been contaminated.
The appeal was allowed and the penalties were set aside.