I'm a big fan of Spaghetti Westerns, but unfortunately; Black Killer really isn't one of the best. The thing that I like best about this type of film is the entertainment value; and that is where Black Killer unfortunately falls down. The film is likely to be a target for many because of the fact that it stars the great Klaus Kinski, and indeed the actor the helped to make The Great Silence such a pleasure puts in a decent performance amidst a somewhat tedious movie. The plot is all over the place, but seems to have something to do with Kinski's lawyer character (complete with gun concealing books) and a band of Mexicans. The atmosphere is gritty, and the film features a handful of fairly nasty scenes; although it's not nearly as action packed as some of the other Spaghetti Westerns released around the same time. You cant really expect coherency from seventies Spaghetti Westerns, of course, and it really wouldn't be a problem if director Carlo Croccolo had managed to make the action entertaining and the characters interesting; but unfortunately this didn't happen. The title refers to the fact that Kinski dresses in black and goes around killing people; but even this theme has been done better in other films (e.g. The Grand Dual). Overall, someone may get some enjoyment out of this; but in a genre populated by entertaining films; I can't recommend seeing this one.