ALBANY — A 51-year-old woman who worked as a library aide at South Albany High School has been accused of having sex in her car with a 17-year-old student. Heidi Hyre also is accused of exchanging sexually explicit text messages with him and two other boys.

She turned herself in to police Tuesday and was held in the Linn County Jail on child sex abuse charges with bail set at more than $180,000.

The Corvallis Gazette-Times reports the investigation began in February and Hyre was placed on paid leave earlier this month.

Superintendent Maria Delapoer said administrators are shocked and appalled that a trusted adult would be allegedly involved in this kind of behavior with vulnerable students.