Robert Mazur spent five years undercover infiltrating the criminal hierarchy of Colombia’s drug cartels. The dirty bankers and businessmen he befriended—some of whom still shape power across the globe—knew him as Bob Musella, a wealthy, mob-connected big shot living the good life. Together they partied in $1,000-per-night hotel suites, drank bottles of the world’s finest champagne, drove Rolls-Royce convertibles, and ﬂew in private jets. But under Mazur’s Armani suits and in his Renwick briefcase, recorders whirred quietly, capturing the damning evidence of their crimes. Then, at a staged wedding, he led a dramatic takedown that shook the underworld. In the end, more than eighty men and women were charged worldwide. Operation C-Chase became one of the most successful undercover operations in the history of U.S. law enforcement, and evidence gathered during the bust proved critical to the conviction of General Manuel Noriega.