More than five years after the deadly attack on the Paris offices of French satirical newspaper Charlie Hebdo, 14 people went on trial Wednesday for their part in helping the three attackers, who were all killed by police. On January 7, 2015, brothers Saïd and Chérif Kouachi entered the newspaper’s offices and killed 11 people, including 8 editorial staffers.

Charlie Hebdo’s director, Stéphane Charbonnier, better known as “Charb,” was among those shot dead.

As they fled the scene, the brothers killed a policeman who had been posted on guard outside the building, following numerous threats to the newspaper.