Wilhelm Brasse, a Polish prisoner at Auschwitz, was made to work as a photographer after camp administrators learned that he had been a professional photographer before the war. He photographed thousands of inmates for identity records as well as documenting medical experimentation on the prisoners. Brasse's work remains one of very few photographic records surviving of the camp. After the war, he was too haunted by his experiences to work as a photographer again. He died on Tuesday. Photograph: Wilhelm Brass/Auschwitz Museum/AP.
I lifted this image and caption from the 'picture of the day' series at The Guardian today. Although I see and write about many, many disturbing images, I have to say this one brought me up short.
Update: Here is an obituary of Brasse from The New York Times.