credit union

The case started in December when Casper police arrested the men on single charges of credit card fraud.

The Arizona credit union told a detective that their clients' credit card numbers had been used at ATMs in Laramie, Rock Springs and Casper.

Malicious software, "malware," was installed in the ATMs to withdraw cash in a computer attack called "jackpotting."

An investigation is underway into the armed robbery of the River Rail Federal Credit Union in downtown Casper.