Movie from 80's or early 90's, teacher is maybe 40 years old, dark hair and a big moustache. Young blonde girl in his class gets a ride home from school but he stops in tye woods where they have sex in the car. Can't remember if it was a rape. In between scenes of the movie we get to a river, with none of the main characters, where there is a shoe floating and later a female body. The parents of the young student finds out about the "relationship" and teacher is forced to leave.