Horse doping was permitted at Jamaica Racetrack in Queens, New York many years after it was formally outlawed at U.S. horse tracks. My e-book looks at a particular case involving a "track follower" named Harold Riner. A gambler who had a previous conviction for grand larceny, Riner was found in the stall of a race horse named Retlaw. The horse was slated to run in the third race at Empire City later the same day. A chemical was found in the stable that was widely known to dope horses, one that slowed and/or retarded their movements. Riner was later charged with tampering with race horses as well as breaking into the stable at Jamaica Racetrack. My text considers Riner's plight and fits it in with the 1930s, a time when doping was common among horse owners and stable hands.