Karl Höllenreiner

Karl Höllenreiner (born 9 March 1914 in Fürth; died 1 September 1984) was a survivor of the Nazi genocide of the Sinti and Roma. He testified as a witness and victim of the seawater experiments at the Nuremberg Doctors' Trial. was arrested on 29 May 1944 and deported to the Auschwitz Gypsy camp. The camp was operational until August 1944. Höllenreiner was tattooed and registered there with the prisoner number Z 10062.

From there he was deported to Buchenwald concentration camp. In mid-July 1944, he was transferred to Dachau concentration camp, where he became an involuntary subject in Wilhelm Beiglböck's seawater experiments. Subsequently, he was deployed as a forced laborer in a subcamp of the Messerschmitt GmbH factory. Others of Karl's family suffered under the Nazis, including Herman Mano Höllenreiner, and Hugo Höllenreiner.

Höllenreiner gave the following account at trial: