When angry customers started phoning his restaurant, accusing his waitstaff of overcharging them, Corino Bonjrada feared that in an already tough economy he could lose his business.

Bonjrada, who has owned Mondello for the past seven years, pressed the callers for details. He learned that within 10 minutes of leaving his restaurant, diners were dinged with mysterious charges ranging from $70 to $90.

Bonjrada contacted a local computer-repair shop and learned that his restaurant had likely been targeted by sophisticated computer hackers.

Bonjrada called Seattle police.

On Monday, U.S. Attorney Jenny Durkan in Seattle credited Bonjrada with helping a multiagency team take down a Dutchman believed to be responsible for trafficking in nearly 45,000 stolen credit-card numbers, resulting in millions of dollars in losses

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