Reading up on Kürten, I discovered he has also been the subject of a handful of books, as well as songs (of the heavy metal / goth rock variety), and inspired characters in other works of fiction. There was also a 1965 movie made about his life called The Vampire of Dusseldorf. Directed, written, and starring Robert Hossein, the film is alternately titled The Secret Killer.
I haven't yet seen the film, but the other day I came across a still of one of the actresses in the 1965 film. It may be Marie-France Pisier. Whoever she is, she has striking resemblance to Louise Brooks.
It's just a strange, kinda creepy, coincidence which also makes me wonder what is it about this feminine type and serial killers? Has it something to do with lustmord? The character of Lulu, played by Brooks, was killed by Jack the Ripper in Frank Wedekind's play and G.W. Pabst film of Pandora's Box. [Thanks to Mark Hodgson and his blog, Black Hole Reviews, for calling attention to the Vampire of Dusseldorf film. UPDATE: the actress pictured above is not Marie-France Pisier. Perhaps it is Tanya Lopert? If anyone knows, please post in the comments field.]