Unraveling Mexico's Sinaloa Drug Cartel

As drug smugglers from the Sinaloa cartel in Mexico sent a never-ending stream of cocaine across the border and into a vast U.S. distribution web in Los Angeles, DEA agents were watching and listening.

For several years, the U.S. Drug Enforcement Administration put the distribution side of Mexico’s Sinaloa cartel under a microscope. This series describes the detailed picture that emerged of how the cartel moves drugs into Southern California and across the United States. Times staff writer Richard Marosi reviewed hundreds of pages of records, including DEA investigative reports, probable-cause affidavits, and transcripts of court testimony and phone surveillance. He also interviewed DEA agents, prosecutors and local law enforcement officers serving on DEA-led task forces, as well as two cartel operatives convicted in the investigation.

(part 2, part 3, part 4)

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