John Thompson's overseas import Maurus is the new winner of this year's Wagga Gold Cup.
This year's $160,000 feature was decided in a stewards room in Sydney on Monday when House Of Cartier was disqualified due to a positive swab.
A stewards inquiry found Randwick trainer John Sargent guilty of presenting House Of Cartier to the races with the prohibited substance, 4-hydroxy xlazine, a form of sedative, in her system.
Sargent was fined $6000 and House Of Cartier was disqualified from the race.
Maurus, ridden by Albury jockey Brodie Loy, is now elevated to first position in what was the veteran stayer's final race start.
Waratah Thoroughbreds own both Maurus and the new second placegetter, Master Of Arts, who is also trained by Thompson.
The prizemoney for winning the Gold Cup is $83,000, as opposed to $29,400 for second. The Young-owned High Opinion is elevated to third.
Sargent tried to argue that House Of Cartier had been a victim of contamination while in Wagga, where the horse was stabled for several hours before arriving on course.
Racing NSW deputy chief steward Wade Birch said those claims were found to be untrue.
"There was an explanation put to the panel about some contamination from the box in which is stayed for a number of hours prior to going to the racecourse," Birch explained.
"But the level was not consistent with contamination, the level was quite high."
Stewards took into account Sargent's good record and the fact it was his first breach in 40 years of training.
Murrumbidgee Turf Club chief executive Steve Keene described the incident as unfortunate.
"It's not ideal but these things are out of our control," Keene said.
"We probably feel for the connections of the second horse, that they weren't able to celebrate what is now a Wagga Gold Cup win and a listed race."
Keene said the club will work with stewards to ensure the Gold Cup trophies are awarded to the new winners.
Sargent also won the Guineas with Foxborough.