During the cartel crime wave, investment continued in Juarez and trade increased.

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The most dramatic part of the story unfolded over the last dozen years, as the caviar cartel collapsed and poachers, entrepreneurs and organized crime rushed in to fill the void.

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"If I pitted Chicago's traditional organized crime group against Guzman and the Sinaloa Cartel, it wouldn't be a fight, " Riley said.

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