Just referencing the information above, it doesn't appear that the Italian track was included on the Redemption/Kino blu-ray after all. As far as I know, none of the DVD releases available include the Italian language track. I just finished re-watching this movie via the Another World Entertainment release. Some of the accents in the English dub are a bit overdone (especially the cockney and Italian characters), but I thought overall it fit in just fine especially considering the actors were obviously speaking English.
This one seems to get labeled as fairly mediocre, but I rather enjoy it. Smartly directed by Castellari with many interesting camera and focus techniques, this movie saw him transitioning quite nicely from Western/historical based material to contemporary crime thrillers. A claustrophobic production overall centering on four desperate characters thrown together in a deadly scenario. It strikes me that the film is really only marginally related to the giallo genre most especially due to the opening nightclub act sequence that, while creating a theme, doesn't much tie into the main plot. Features one of those Morricone scores that isn't a lot of fun to listen to on its own, but generates a great sense of edginess in context with the movie.