Principal threatened by a student in Dijon: how the anti-intrusion alarm probably helped to avoid a tragedy. Obligatory since the attacks of 2015, this alarm, which was triggered by the head of the college, allowed adolescents to confine themselves to their classrooms.

“The devil is in the details” A procedure which, however, has some flaws. Just after the intruder alert, the fire alarm also went off, creating confusion among the students. Some left the establishment while the suspect was still in the corridors.