Though there is no evidence, Maigret is convinced that Jehan d'Oulmont, a Belgian, has killed his uncle, Count Adalbert d'Oulmont, at the Hôtel du Louvre in Paris. But his alibi is that he was at Longchamp at the time, and it can't be broken. Maigret decides to dog him and his mistress, Sonia Lipchitz, and so returns with them to Brussels, and watches as their funds dwindle. He hopes to force them to reveal the stolen money. At a nightclub Maigret appears drunk and asks Sonia to dance, after which a Belgian CID man told Oulmont he was under arrest. Oulmont grabbed Sonia's purse and pulled out a gun a friend had supplied, shooting at Maigret. But Maigret has had the bullets replaced with blanks. Oulmont had thought the way to avoid extradition to France, where there is a death penalty, was to commit another murder in Belgium, where there is none.
This report prepared by Dana Samson