Le Corbeau [Blu-ray] [Criterion Collection]

The drama is set in a French village where some nasty soul has been causing a local uproar by sending poison pen letters to prominent citizens. The prime target is the local doctor with the mysterious past; as the town paranoia increases, it is he who becomes the prime suspect, but in the end, the real culprit, the is revealed. He is the last person any one would have suspected.