Overview

• Chapellier was convicted by the Tribunal de Nanterre on June 6, 2025, for sexually assaulting a 14-year-old student in his office.
• The court handed down a five-year suspended prison term, imposed a matching ban on working with minors and added him to the national sex offenders registry.
• Prosecutors had sought a lighter three-year suspended sentence, but judges emphasized the gravity of abusing his role as a school director.
• Conflicting witness accounts from parents, staff and an assistant director prompted the tribunal to side with the student’s detailed testimony over Chapellier’s denials.
• Investigators discovered searches for “teen boys” on Chapellier’s computer, which he maintained were intended to understand his pupils’ online habits.