When Mexican special forces killed El Mencho in February 2026, the throne of Mexico's most powerful cartel was up for grabs. But there's one man who many assumed would be taking over: Juan Carlos Valencia González, a 41-year-old California-born dual citizen known as "El 03," the stepson of the slain narco boss.

His cartel royalty bloodline is almost absurdly stacked, as his mother, Rosalinda González Valencia, dubbed "La Jefa," was El Mencho's wife and a key financial architect of the cartel's money laundering empire, while his uncles from the González Valencia clan were systematically arrested and extradited to the U.S. over the past decade. And his father just happened to be the founder of CJNG's predecessor, the Milenio Cartel.

Now an American citizen effectively runs a terrorist-designated drug empire responsible for flooding the U.S. with fentanyl, creating a legal nightmare for U.S. intelligence agencies with limited tools to go after one of their own.

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