Law & Order S15E22 - Sport of Kings

The shooting death of a Panamanian horse jockey puts Detectives Fontana and Falco on the track of a pack of colorful suspects who inhabit the competitive racing world, forcing them to nudge jockeys, trainers, and even a rich owner; to discover who would murder the rider over his desire to ride one particular horse. However, their probe reveals that the victim challenged the registry and selling details of the prized three-year-old, leading the cops and EADA McCoy to a corporate head who bought the thoroughbred with stolen funds.