Klaas Faber was a Nazi collaborator in occupied Holland, joining the feared Waffen SS one month after the German invasion. With ruthless efficiency, he commanded the firing squad at Westerbork concentration camp. Westerbork briefly held Anne Frank before she was sent to her death. After the war, he was sentenced to death by a Dutch court, however, he escaped in 1952 and made it back to Germany.
German authorities dismissed charges against him claiming a lack of evidence (despite evidence proving he was a member of the Sonderkommando Feldmeijer execution squad).
Faber ended up working for the German automobile manufacturer Audi and faced no punishment for his war crimes.
He passed away in 2012 at the age of 90.