Keizer police said Michael Wayne Dietrich, of Keizer, was arrested Thursday and charged with 52 counts of first-degree forgery and possession of forged money -- as a result of an investigation that began when a man told officers he sold a gun to a man who paid with $20 bills that bore identical serial numbers, The (Portland) Oregonian reported Friday.
"What led to the investigation is counterfeit twenties were used to purchase a firearm from an individual," Capt. Jeff Kuhns said. "All the twenties had the same serial number."
Dietrich was arrested following a three week investigation into his alleged counterfeiting practices.
Kuhns said a total 52 counterfeit $20 bills and $50 bills were found in Dietrich's home and police do not know how many other counterfeit bills may have made it into circulation.
"We found evidence he had destroyed a lot of counterfeit bills," Kuhns said. "He shredded them."
Dietrich's wife, Melissa, was arrested on charges of possession of forged money and possession of meth.
Department of Revenue officials said they have not found any evidence Kuhn's alleged crimes were tied to his work, but they are looking into whether he used his access to confidential tax information for any illegal activities.