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.
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Verdict: Unknown
> Maurice Labro (Director)
> Pierre Petit (Director of Photography)
> Yvan Noé (Screenplay)
> Maurice Labro (Screenplay)
> Francis Didelot (Novel)