Margarito Flores, Chicago cocaine kingpin who helped bring down El Chapo, will teach cops how to catch drug traffickers

Margarito Flores (right) and his twin brother Pedro Flores once were the biggest drug traffickers in Chicago. Now both out of prison, Margarito Flores is teaching law enforcement authorities how to fight the cartels and catch drug traffickers. (U.S. Marshals Service)

Margarito Flores Jr. and his twin brother Pedro Flores once were the biggest drug traffickers in Chicago, importing a ton of cocaine into the country every month.

Over the years, the Flores twins brought in 60 tons or more, authorities say — and sent more than $1.8 billion in cash back to Mexico to pay for those drugs, putting them among El Chapo’s biggest customers.