Cecile, a young girl who goes to the offices of the Judicial Police several times in a row to complain about nightly visits to the apartment she occupies with her aunt, is not taken seriously by the police until she the day she is found murdered.
Le commissaire Maigret
Albert Préjean
Cécile
Santa Relli
Madame Boynet
Germaine Kerjean
Madame Petitot, la concierge
Luce Fabiole
Nouchi
Liliane Maigné
Lucas (as Gabriello)
André Gabriello
Dandurand
Jean Brochard
Machepied
Yves Deniaud
Gérard Pardon
André Reybaz
Dr. Pierre
Marcel Carpentier
Le directeur de la P.J.
Marcel André
Le juge d'instruction (as Henri Bonvalet)
Henry Bonvallet
Monfils
Charles Blavette
Hélène Pardon (uncredited)
France Asselin
Monsieur Louis (uncredited)
Paul Barge
Monsieur Paul (uncredited)
Jacques Beauvais
Un inspecteur (uncredited)
Fernand Blot
Léopold (uncredited)
Charles Camus
Voyageur dans le métro (uncredited)
Jean Clarieux
(uncredited)
Marius David
L'amie de la concierge (uncredited)
Charlotte Ecard
Un gendarme (uncredited)
Pierre Ferval
Le serrurier (uncredited)
Eugène Frouhins
Le médecin (uncredited)
Gustave Gallet
La femme au tandem (uncredited)
Alice Gosset
L'homme au tandem (uncredited)
Georges Gosset
Le raccommodeur de faïence (uncredited)
Charles Lavialle
Le garçon d'étage (uncredited)
Jean Martin
Le chauffeur de taxi (uncredited)
Marcel Melrac
Une amie de Madame Petiot (uncredited)
Geneviève Morel
La femme de ménage (uncredited)
Julienne Paroli
Un complice de Dandurand (uncredited)
Marcel Raine
Un inspecteur (uncredited)
Maurice Salabert
Un inspecteur (uncredited)
Henri Vilbert