Maigret has Scruples

Xavier Marton, the head of the toy department at the Grands Magasins du Louvre, a model train specialist, visits Maigret to say that he thinks his wife wants to poison him, but leaves while Maigret is out of the room. Later in the day the man's wife, Gisèle Marton, also visits Maigret, to tell her side of the story, which is that her husband is having delusions. Marton comes the next day, and agrees to have another examination with a psychiatrist. But he warns Maigret that if she poisons him, he'll shoot her before he dies.