UNDERWOOD, Iowa (AP) — A teacher at an Iowa middle school has been arrested on charges related to a claim that he sexually abused a former female student.

Pottawattamie County officials say 45-year-old Barret B. Glasnapp turned himself in Monday on an arrest warrant of four counts of sexual abuse, one count of felony sexual exploitation by a school employee and five misdemeanor counts of sexual exploitation by a school employee.

Authorities say Glasnapp’s interaction began in 2011 when the student was 14, after her eighth-grade year, and continued until October. She was a student of Glasnapp from 2009 until 2012.

According to an affidavit, an investigator assigned to follow up on a report of a sexual assault at Underwood Middle School in December found that Glasnapp had resigned from his post in November.