Trump's strange message about the Kentucky Derby 2:18
(CNN) --
The Kentucky Horse Racing Commission (KHRC) announced Monday that Medina Spirit's victory in the 2021 Kentucky Derby has been voided.
The horse failed a drug test after crossing the finish line in first place in the Derby.
Medina Spirit died in December.
The thoroughbred was finishing up a workout when she collapsed near the finish line at the Santa Anita Park racetrack.
Medina Spirit, the winning horse of the Kentucky Derby, dies suddenly
The KHRC also announced a 90-day suspension for Hall of Fame trainer Bob Baffert, who trained the Medina Spirit, and fined him $7,500.
Baffert said that he plans to appeal the decision.
"I am very disappointed in the ruling," Baffert said in a statement provided by his spokesman to CNN.
"It goes against the scientifically proven facts in this case and the rules of the Kentucky Horse Racing Commission. We will file an appeal immediately."
The commission said the winner's prize of $1.86 million must be returned.
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Skijoring, the mix of horses and skis in a race
Churchill Downs, where the famous race is held, said Mandaloun is now the winner of the 147th Kentucky Derby.
"Today Churchill Downs recognizes Mandaloun as the winner of the 147th running of the Kentucky Derby and extends our congratulations to owner/breeder Juddmonte, trainer Brad Cox and jockey Florent Geroux," Churchill Downs said in a statement Monday.
"Winning the Kentucky Derby is one of the most exciting achievements in the sport and we look forward to celebrating Mandaloun at a future date in a manner befitting this rare distinction."
-- CNN's Nick Watt and Wayne Sterling contributed to this report.