Barry Cooper, before: making a bust as a narcotics cop. "I thought I had the greatest job in the world -- I was the young hot shot narcotics cop," he says. "It was thrilling for a young man being thrown in that game." (Courtesy Barry Cooper)

Weekend Underground: Turncoat Narc

Barry Cooper, before: making a bust as a narcotics cop. "I thought I had the greatest job in the world -- I was the young hot shot narcotics cop," he says. "It was thrilling for a young man being thrown in that game."

Credit: Courtesy Barry Cooper