El monstruo de St. Pauli

There was a scene shot of Fritz Honka's childhood when he was raped. But in the editing, Fatih Akin found them disturbing because it was a stupid explanation. Saying that "just because you are raped as a kid it doesn't give you the permission to be a serial killer. Lots of people have been raped as kids and not turned into serial killers and it would be a slap in the face to them".

The red and white "One way road"-sign that is shown in the street where Fritz Honka gets run over by a car was in use until 1971, while the scene is set in 1974. In 1974 blue and white signs were used. However this could have been intentional to show the old and more dirty the streets of Hamburg-St. Pauli in the 1970s.

The closing credits are accompanied by the photos of the real Honka, portrayed people, the real places, weapons he used etc.

Referenced in Horrible Reviews: THE GOLDEN GLOVE (2019) A truly ugly, filthy piece of German cinema (2020)