Inspector Maigret (1950's)

For some time now, women coming home at night have been savagely murdered by a mysterious serial killer. Inspector Lagrume thinks he has found the culprit in the person of Barberot, a local butcher. But Maigret, who takes over the investigation, is not convinced. Deep inside himself, he knows the murderer is still at large. But how to trap him ?

Gangsters from the United States try to kill a key government witness whose testimony could help land an influential mobster in jail. It's up to detective Maigret to deal with the FBI and a series of underworld figures to save the life of the witness.

Inspector Maigret is traveling to the French countryside to visit his friend, the duchess of Saint-Fiacre. She has received a letter recently stating that she will die soon. A few days later she does so by an heart attack, but Maigret does not believe in this...