Prescott police are investigating a counterfeiting scheme in a Prescott Costco. Police say three suspects, Debra Hernandez, Robert Kunard, and Robert Greves were allegedly attempting to pass out fake one-hundred-dollar bills. Each of the suspects were found with counterfeit bills and will face a variety of charges. Call Prescott police with any information on counterfeit bills used in the area at 928-445-3131.