Very big case indeed.
We have a witness protection program in France that was put in place specifcally to fight Corsican OC but, as explained in Hollander's article, it's relevant for non violent criminal which is absurd.
One of the first informant was a Corsican guy who confessed taking part in the murder of a Corsican Mob Boss (Richard Casanova) and depite his testimony, he was still sentenced for the murder. That's why the judge are advocating for a similar system as the Italian.