Rising Drug Use on California's Horse Racing Tracks?

Woth $4.1 billion a year, California is the biggest horse-racing state in the nation, but it's falling behind on enforcement of rules against the drugging of horses. In the past six years, more than a quarter-billion dollars have been bet on winners who failed drug texts after their races were over, creating "a climate for drug abuse that is unmatched in any other major sport." That's according to a lengthy investigation by the Orange County Register. Are horse owners preventing a crack down? Is the series a hatchet job?