Forget Breaking Bad, this is the extraordinary story of the 1970s Welsh LSD ring that supplied the world, told by a cop in deepest cover on the case. Life undercover was one great adrenaline rush fuelled by copious amounts of alcohol, hash, weed and some cocaine. I was off the leash. In the mid-1970s, at the age of 29, Stephen Bentley, a fresh-faced detective, turned himself into Steve Jackson, a dope-smoking, hard-drinking hippie. His time...