Mourad Hamyd was arrested on a French arrest warrant in Bulgaria for allegedly planning to join the Islamic State group in Syria or Iraq.
He is the brother-in-law of one of the men who attacked the satirical newspaper in January 2015. He was initially suspected of a role in that attack, but his classmates launched a successful campaign to clear his name.
Hamyd agreed today to be extradited to France, but shouted "This is unjust!" before entering the courtroom.