Prosecutors say two kilograms of fentanyl, worth $200,000, found during a traffic stop in Cary last month is one of the largest fentanyl busts in McHenry County history.

Patricio Rosales-Diaz, 43, of Palatine, and Joaquin R. Montano-Martinez, 28, of Mexico, were both charged with manufacturing or delivering fentanyl over 900 grams, a Class X felony, and possession of more than 900 grams of heroin, a Class 1 felony.

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