Mania series: “Unsuspected”, the murderous madness of “Grêlé” in a chilling docu-fiction from France 2. Presented this week as part of the festival in Lille, this moving series, which should be broadcast in the fall, retraces the park where the murders took place.

This serial killer, gendarme, then police officer, author of at least four murders and six documented rapes in the Paris region, with eight children among the victims, has never been arrested.