This may seem like a very bizarre and silly statement, but bear with me. If the Giallo sub-genre is one big and joyful family, then "Crazy Desires of a Murderer" would be the weird and creepy uncle! He's unreliable and always involved in some sort of trouble, but his stories and lifestyle are utterly fascinating. Nobody openly appreciates his perverted remarks or his twisted sense of humor, but secretly everybody loves him just a little bit. And, finally, the family party or reunion simply isn't complete without him.
What I basically mean with the above gibberish is that "Crazy Desires of a Murderer" is a very atypical and experimental Giallo, but nevertheless one that keeps you intrigued and amused even though the overall sentiment at the end is disappointment. Arriving quite late at the party (the giallo's heyday ended around 1974-1975; while this was released in 1977), the script incorporates various other non-giallo styles, genres, and story elements.
The rudimentary plot of a spoiled rich girl and her eccentric friends being stalked by a sadist killer is pure and unhinged Giallo, obviously, but the setting at the remote old family castle with its mandatorily sinister inhabitants (a crippled patriarch, a spooky amateur-taxidermist son, a cold-blooded housemaid...) also makes the film an authentic gothic-horror effort. There's also a crime/thriller angle, since one of the guests at the castle is up to his neck into drug-smuggling and plans the theft of a valuable family jewel. As soon as the police inspector enters the scene, played by the eminent Corrado Gaipa, "Crazy Desires..." even almost turns into an Agatha Christie novel, since he's a sort of Poirot who draws all the attention to him and sets traps for the potential culprits. Last but not least, the film also shares the contemporary Italian fetish for eyeball-violence. There's a regrettably low number of kills in this film, especially considering the expanded cast, but the poor girl who gets it first suffers tremendously as her eyes are literally spooned out of the sockets and put in a bag.
As said, a very strange flick full of gratuitous sex and shocks, but also one that is ultimately unsatisfying. Director Filipo Walter Ratti has enough material here to fill at least two full-length movies, but stuffing everything into one script made it hectic and unnatural.