Justify’s incredible Triple Crown triumph last year may be tainted.

The colt tested positive for scopolamine — which the U.S. Library of Medicine indicates could enhance performance in horses — on April 7, less than a month before the Kentucky Derby, according to the New York Times.

Failing a drug test should have led to disqualification, but the California Horse Racing Board reportedly took more than a month to confirm the results.

Four months after Justify became the 13th Triple Crown winner, the board threw out the drug test all together, citing that the test could have been the result of the horse eating jimson weed, which is known to contain high levels of scopolamine.

“There was no way that we could have come up with an investigative report prior to the Kentucky Derby,” Rick Baedeker, the executive director of the board, told the Times. “That’s impossible. Well, that’s not impossible, that would have been careless and reckless for us to tell an investigator what usually takes you two months, you have to get done in five days, eight days. We weren’t going to do that.”

Instead, the board eventually buried the case, and in October lessened the punishment for horses caught for using the drug to a fine and possibly a suspension rather than a disqualification.

Dr. Rick Sams, who previously headed the drug lab for the Kentucky Horse Racing Commission, said the amount found in Justify indicates malpractice.

“I think it has to come from intentional intervention,” Sams told the Times.

Bob Baffert, Justify’s Hall of Fame trainer, reportedly was made aware of the failed drug tests nine days before the Derby. Members of the board, including chairman Chuck Winner, reportedly own an interest in horses trained by Baffert.

The breeding rights to Justify, who retired undefeated shortly after the 2018 Belmont Stakes, were sold for $60 million after the horse won the Preakness Stakes.

The Triple Crown has been mired in controversy over the past year. In this year’s Kentucky Derby, Maximum Security was disqualified after finishing first, when the stewards ruled it impeded the progress of other horses. Country House was then named the winner.