POWELL, Wyo. (AP) — Federal prosecutors have charged the former CEO of a Powell hospital with fraud, alleging he worked with an accomplice in Indiana to rack up more nearly $850,000 in false billings last year for staff recruitment work that was never performed.

The Powell Tribune reports former Powell Valley Healthcare CEO Paul D. Cardwell and Michael J. Plake of West Lafayette, Ind., were indicted this month on 15 counts, including mail fraud, wire fraud and conspiracy to commit money laundering.

Cardwell resigned as CEO of the Powell hospital in September. He also faces a civil lawsuit filed by the hospital alleging embezzlement.

Cardwell and Plake both pleaded not guilty at initial court appearances this week. They are scheduled to stand trial June 4 in before U.S. District Judge Nancy Freudenthal in Cheyenne.