In this early Fulci work the director shows his most mainstream side as well as a talent for compelling storytelling and more than reasonable elucidation for the genre. Personally I think he has been unfairly maligned throughout his career as an aesthete of gore. It's a pretty capable procedural and surprised me with its subtextually rich narrative that shows his distrust for small minded small-town mentality and the inefficiency of the police, as well as the twisted ideals of the Catholic church, the last of which seemed to have cut this film at its knees when it was first released and could have possibly given the director another direction so early on. The comparative lack of gore in the film shows a more urgent and psychological imperative to this film in its prevailing "mystery" but the gore and puppetry he does utilise is put to good use here most notably in the scene where a falsely accused murderer is senselessly lynched by a mob of men in a graveyard and left for dead in a show of vile and antiquated vigilantism, expertly choreographed to the modern tunes off a diegetic radio.
Another example was the final scene (which was indeed awesome) in which a strikingly handsome priest falls from a cliff and the puppet used is markedly showed in a medium closeup which accentuated its demonic appearance and evident ugliness. Curiously, considering his later works, Fulci also invokes the idea of modernity seized upon the hamlet holding on to its anachronistic superstitions and ignorance when the idea of black magic is just that, a quaint idea of supernatural evil that never really ends up manifesting from the voodoo dolls while making its witch nothing more than a disturbed woman. Another thing I liked was that he adds to these character layers by making a bourgeois city girl into an ambiguous figure - is she the corrupter the priest fears for his wards and perhaps more tellingly, for himself? This giallo does lend itself to becoming one of Fulci's more personal and substantive films, in that we actually get a fair influx of ideas from him.