A former Sacred Hearts Academy teacher and sailing coach is facing seven counts of sexual assault for an alleged incident involving a 15-year-old student.

William Plourde, 53, of Honolulu, was arrested Wednesday night after calling police and requesting to turn himself in for having sexual contact with a minor, according to court documents.

Betty White, head of school for the all-girls private Honolulu campus, said Plourde’s employment was terminated Wednesday afternoon.

The victim — who said Plourde was her former homeroom teacher — told police the alleged incident occurred June 6 in Mililani in Plourde’s vehicle, the documents said.

Plourde was arrested for third-degree sexual assault, and charged with one count of first-degree sex assault and six counts of third-degree sex assault, according to the city prosecutor’s office.