How El Chapo’s Man in Chicago Became a Police Consultant
Margarito Flores developed a U.S. delivery platform for drugs. Now he advises police officers on dismantling gangs that operate like criminal versions of Amazon.
BILLINGS, Mont.—Margarito Flores has the jitters. Once one of the top kingpins in the U.S. for Mexico’s Sinaloa cartel, he is starting a second career—teaching law-enforcement officers how to catch drug traffickers.