Schramm (1993) is a German exploitation horror film written and directed by Jörg Buttgereit, with screenplay credit also to Franz Rodenkirchen.
It tells the story of a man referred to in the media as the 'Lipstick Killer', who is believed to have had multiple victims.
When Marianne is invited by some affluent gentlemen clients to a villa outside of town, she asks Schramm to chauffeur her so she'll be safe.
The last passage shows Marianne in the villa outside of town, attired like a Hitler Youth, and bound and gagged on a chair.
The film opens with a quote by American serial killer Carl Panzram (executed 1930).