Günther Tschanun

Günther Tschanun was a Swiss civil servant who infamously committed a mass shooting in 1986, killing four of his employees at the Zurich Building Police, driven by what he claimed was severe workplace bullying. After serving ten years in prison, he changed his identity and lived a secluded life until his death in a cycling accident in 2015, which was only revealed to the public in 2021.