The Quiet Executioner: Günther Tschanun and the Zurich Building Authority Massacre
On a normal April morning in 1986, the head of Zurich’s public construction authority walked into his own offices with a revolver and systematically executed four of his colleagues. He fled, vanished for three weeks, and was later caught in France.
Günther Tschanun was an architect, a Social Democrat, a dancer, and a seducer. After serving time he reappeared under a new name in Ticino, living quietly as Claudio Trentinaglia until a bicycle accident revealed the truth years after his death.
Host Alexander Lawson reconstructs one of the most shocking workplace massacres in modern Swiss history…
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