MASON CITY, Iowa — A one-time Charles City school board candidate accused of sexually abusing a teenage boy will be retried on charges in the case in Mason City.

The Courier reports that retrial for 62-year-old Douglas Lindaman has been set for April 9 at the Cerro Gordo County Courthouse. The move comes after a district court judge declared a mistrial during Lindaman’s February trial when a witness mentioned Lindaman’s prison stint, violating a court order that there be no testimony about Lindaman’s criminal record.

Lindaman was sentenced in 2016 to 10 years, but Iowa Supreme Court later vacated the conviction, because Lindaman was allowed to represent himself without knowingly waiving his right to an attorney.

Lindaman is accused of performing a sex act on a 17-year-old without the boy’s consent.

Information from: Waterloo-Cedar Falls Courier,