Alvarez Inzunza was arrested in the southern state of Oaxaca while vacationing without the "need to shoot off firearms and without putting other citizens at risk," police said.
Authorities said the financial operator ran a network of companies and currency exchange centers that laundered between $300 and $400 million per year for the Sinaloa cartel, one of the most powerful drug gangs in the Americas.
He faces possible extradition to the United States.
The arrest comes three months after Guzman was detained after escaping from prison last July.
The drug kingpin has escaped twice from maximum security prisons and faces possible extradition to the United States.
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