FAIRFIELD - A Fairfield high school teacher has been arrested for allegedly having a sexual relationship with a student.

Police say Glenn Mishuck, 47, turned himself in Thursday morning and is facing 17 counts of sexual assault.

Police did not release the victim's name, but say she is under 18 and is a student at Fairfield Ludlowe High School.

Investigators say the incidents happened between July and September of this year and included text messages. The victim's smartphone helped investigators get a warrant.

In a statement, school officials said that Mishuck submitted his letter of resignation on Oct. 7 and is no longer an employee of the Fairfield Public Schools.

The judge set his bond at $150,000.