The New York Times Sports department is revisiting the subjects of some compelling articles from the last year or so. Here is our May report on the Kentucky Derby disqualification of Maximum Security.

Luis Saez has watched the replay too many times. He has watched it with the Hall of Fame riders he competes against daily; with the horse trainers who employ him; alone at night at his home in New York.

The video dates to the first Saturday in May, and Saez is turning for home on a colt named Maximum Security, looking to all the world to be the clear winner of the 145th running of the Kentucky Derby.

He crosses the finish line first. He remembers his heart leaping out of his chest, his hand rubbing his champion colt. Now, all Saez has to do is get the colt to the winner’s circle. He needs to make space for the blanket of roses that comes with winning America’s most famous race.