Mexican Drug Groups in Chicago is the true account of cocaine trafficking and money laundering activities conducted by cartels in Chicago. The story begins with an explanation of how cartels establish insulated groups to move cocaine and money, explores the difficulties that law enforcement encounters when trying to penetrate those groups, and provides a chronological account of wiretap investigations into two different Mexican cartels; one based in the state of Durango and the other in the state of Michoacan. Every million-dollar money seizure, every seizure of hundreds of kilograms of cocaine, and every setback to law enforcement is described throughout the narratives of both investigations. Mexican Drug Groups in Chicago provides a rare glimpse into the staggering amounts of cocaine and drug money that flow through Chicago.