Karl Wirtz

Karl Eugen Julius Wirtz (1910 – 1994) was a German nuclear physicist. He was arrested by the allied British and American Armed Forces and incarcerated at Farm Hall for six months in 1945 under Operation Epsilon.

Karl Wirtz in The Man With the Iron Heart
Karl Wirtz was one of several German physicists the British were holding at Alswede in 1946. Reinhard Heydrich personally oversaw a mission to kidnap those scientists, in the hopes that they could build the German Freedom Front an atomic bomb. Wirtz disabused Heydrich of this notion, but did reveal the existance of 10 grams of radium still located in Hechingen, located in the French Occupation Zone.