Desc: Les gosses mènent l'enquête: Directed by Maurice Labro. With Constant Rémy, Lise Topart, René Génin, François Patrice. When Monsieur Crauqual, the supervisor, is found hanging, all wonder why this rather rich person decided to kill himself. And when a pupil is found hanging too, François and his friends decide to investigate. They are certain there is a killer within the walls of Collège François 1er and determined to prevent him from going on running wild.