John Marra, 37, pleaded no contest to dereliction of duty in 2008 and resigned as a Uniontown police officer. He was sentenced to two years of probation.
Marra is now the police chief of Brady Lake in northeastern Ohio.
Court records say Marra had sex while on duty with a girl when she was 16 and 17.
The Repository reported Judge John Poulos sealed Marra’s conviction Thursday. It will no longer appear in public court records.
Prosecutors who argued against sealing the record said Marra should be held to a higher standard.