Martin Suarez, a legend within the FBI who specialized in Colombian drug cartels, holds the record for the longest time spent continuously undercover. As his alter ego Manny, Martin followed the unspoken rules of the cartels: He knew the right lingo to use, the right whiskey to drink, the right...

Despite what Scarface might lead one to believe, violence was not the dominant characteristic of the cocaine business. It was corruption: the dirty cops, agents, lawyers, judges, and politicians who made the drug world go round. And no one managed that carousel of dangerous players in the South...