CROWCASS notified SHAEF, insisting that Dr. Ambros be arrested. As the plant manager at Farben’s Buna factory at Auschwitz, Otto Ambros had been linked to atrocities including mass murder and slavery. The Sixth Army Group swung into action. But when they arrived at Ambros’s home in Gendorf, arrest orders in hand, Ambros was gone. The first assumption was that Ambros had fled on his own. This proved incorrect. He had been taken away by Lieutenant Colonel Philip Tarr.

