Lucio Fulci - Non si sevizia un paperino AKA Don’t Torture a Duckling (1972)

SYNOPSIS
An often overlooked but accomplished giallo (Italian detective story) from the macabre mind of Italian director Fulci. After several small boys are found murdered in a small town, a journalist goes in search of the killer. Even in a town steeped in ancient superstitions and suspicion, the twisted motives of the murderer are more shocking than anyone could have ever imagined. (Rotten Tomatoes)