The 2015 attacks began with Cherif and Said Kouachi’s raid on the satirical magazine Charlie Hebdo, killing 12 people. The next day their accomplice Amedy Coulibaly shot dead a policewoman in Montrouge before storming a kosher supermarket, taking shoppers hostage and killing four men aged 20 to 64.
The attacks were the first in a wave of terror that killed 246 people in France that year. The gunmen were also killed.
French media said any trial of alleged accomplices is expected to be held in 2020 and last about three months.
But most of those facing charges are not accused of playing a major role in the attacks — with the exception of Ali Riza Polat, who is suspected of organising Coulibaly’s weapons arsenal. Those who ordered the assaults are considered likely to be in hiding in Iraq or Syria.
“It feels like the same story every time in these cases. Take the example of Jawad Bendaoud,” Mr Metzker said, referring to the 32-year-old suspected of hiding the mastermind of the deadly November 2015 Paris attacks in his flat.
“He was acquitted. Meanwhile the people who we know indoctrinated all those people who became terrorists walk freely — and are even invited to talk shows.”
He added: “Victims families and lawyers feel abandoned. There is so much work to do we can’t accomplish this alone.
“Authorities are not doing all they can and should do. It seems we haven’t learned the lessons of those attack yet.”
The trial of the January 2015 suspects is expected to take place before those alleged of involvement in the November attacks, which included the shooting at the Bataclan concert hall.
