Jean-Marc Reiser was sentenced to life imprisonment and 22 years of security for the assassination of Sophie Le Tan.
When the verdict was announced, he remained stoic, hand behind his back, looking down.
In his last speech, he had demanded a "just" sentence and reaffirmed that he had never wanted or planned Sophie's death.
“I hope that you can judge calmly, that it be a fair, just verdict, not a summary execution”, declared the 61-year-old man, in a last long speech before the jurors leave to deliberate.
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“In this fury that I still cannot explain to myself today, there was nothing premeditated.
I did not particularly want Sophie Le Tan, I had nothing against her, ”he continued.
He again complained of being presented "like a monster" in a "kind of media lynching".
Then addressing the family of Sophie Le Tan, but keeping his head down, Jean-Marc Reiser said he "faced their immense pain" and understood that they could not forgive him: "I am guilty of the death of their daughter even though I didn't want her to.
It will haunt me for the rest of my life.”
On Thursday, life imprisonment with 22 years of security, the maximum sentence, had been requested against him.