Nicolet High School is investigating an allegation that a teacher engaged in an inappropriate relationship with a student more than 20 years ago.
Superintendent Robert Kobylski notified parents of the probe in an email this week, saying the teacher has not worked in the district since the 1990s.
Kobylski declined to describe the nature of the relationship, or provide other details of the allegations. But his email to parents referenced the district's policies "on personnel-student relationships and sexual harassment. He said the allegation was brought by the student, who graduated from the school.