Robert Mazur spent five years undercover infiltrating the criminal hierarchy of Colombia's drug cartels.
The dirty bankers and businessmen he befriended knew him as Bob Musella, a wealthy, mob-connected big shot living the good life.
Together they partied in expensive hotels, drank the world's finest champagnes, drove Rolls-Royce convertibles and flew in private jets.
But under Mazur's designer suits and hidden away in his quality briefcase, recorders whirred quietly, capturing the damning ev.