The Secret Killer (1965)

A major discovery, for me, this one, written, directed and starring, Robert Hossein. Evidently a highly esteemed French actor who played many a romantic lead with the likes of Bardot and Loren, he also played less frivolous parts including thrillers such as Riffifi.

Whilst reading up about Robert Siodmak's wenn der Teufel kam (which I've not seen yet!),I found out that a fellow IMDber had kindly sent me a DVD of Robert Hossein's take on the real life Dusseldorf serial killer,which led to me getting ready to unmask the "Vampire of Düsseldorf.

The movie is loosely based upon life of Peter Kurten, the psychotic serial killer from Dusseldorf, Germany. Apparently looks and says like it, but this movie is not closely accurate.