End of the Game (1978)

""I could murder her in front of your eyes and you couldn't prove it," said the master criminal to the master detective. And so the game began..."

Hans Baerlach is a Swiss police detective who has dedicated much of his career to pursuing powerful and allegedly murderous businessman Richard Gastmann. Though Baerlach's partner meets his demise while investigating Gastmann, his replacement, Walter Tschanz, is undaunted. Meanwhile, the lovely Anna Crawley becomes involved in the case, which proceeds to take many twists and turns.