On May 4, 1968, Dancer's Image crossed the finish line at Churchill Downs to win the 94th Kentucky Derby. Over forty years later, questions still linger over the origins of the substance and the turmoil it created. Yet the jubilation ended three days later for the owner, the jockey and the trainers who propelled the celebrated thoroughbred to victory. Amid a firestorm of controversy, Dancer's Image was disqualified after blood...