Oskar Gröning ( sometimes transliterated as Oscar Groening in English ; born 10 June 1921 ) is a German former SS - `` Unterscharführer '' who was stationed at Auschwitz concentration camp .
Oskar Gröning ( sometimes transliterated as Oscar Groening in English ; born 10 June 1921 ) is a German former SS - `` Unterscharführer '' . He was stationed at Auschwitz concentration camp .