The incident took place on the 12th September 2016 at the lycée Louis-Armand, in Turn, in the Rhone.
Manon, a student in the first S, out of a course when, arriving in the playground, a classmate had approached her and had stabbed her repeatedly in the back and the neck.
Then, while the victim was on earth, he had continued to bear him of the stabbing. The victim, aged 15, had died on the spot from his injuries.
The murderer, unknown to the police services was described as an introvert. He had explained that the idea to kill Manon, a comrade of whom he felt very close, had germinated in his mind during the summer of 2016.
The very nature of their relationship remains difficult to determine. The two students knew each other, but did not see themselves outside of the classroom. Friendship, imaginary or disappointment in love ? The gesture of the teen still retains today a great part of mystery.
Hospitalized since, the accused, finally considered to have a discernment altered, but not abolished, could be tried for murder.
He was sentenced Friday to 10 years in prison.