This is a good, solid, beautifully photographed crime thriller. My misfortune was to pick this film to watch the night after watching, Illustrious Corpses. Now that Italian political crime thriller made in 1976 and based upon a book by Leonardo Sciascia is a near faultless classic with deep undertones and a broad scope that is simply a joy to watch. This, it turns out, is another film based upon another book by Leonardo Sciascia from 1967. How much more sensible it would have been to watch this one first. The thing is there is nothing wrong with this film except it is also about too easily explained killings that the lead character sets out to investigate and in the process overturns a hornets' nest, but there is much less action, intrigue and politics. Gian Maria Velonte is excellent as the professor who takes it upon himself to get involved when most people seem not to care. Interestingly this was the film that helped to lift this actor into more 'serious' films, after having made many spaghetti westerns, one of the last being face to Face also from 1967 when he also played a professor.