The Hanged Man of Saint-Pholien (Inspector Maigret) by Georges Simenon

Suddenly witness to a man's dreadful death, Inspector Maigret finds himself faced with a series of sordid events that drove the man to despair in this haunting tale of guilt and tragedy.

While stopped at a railway station on the northern edge of Holland, Inspector Maigret catches sight of a traveler acting oddly: the man glances around furtively, pulls out handfuls of coins to pay for purchases, and guards a small suitcase. Maigret decides to follow the man, thinking he'll help catch a crook - but then the inspector witnesses something terrible. The stranger leaves behind only a passport with a false name and an old, large, dirty gray suit. Struck by guilt, Maigret resolvesto figure out who this man was and why events ended so tragically. The Hanged Man of Saint-Pholien is a moving and deep exploration into the burdens of conscience and the lengths one might go in pursuit of absolution.