Karl Eugen Julius Wirtz (24 April 1910 – 12 February 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.
When American forces finally located Heydrich's headquarters, Wirtz and Kurt Diebner were specifically ordered to accompany Heydrich while he escaped. The others were immediately shot to death. However, the group didn't get very far before they were spotted by Bernie Cobb. Heydrich and Diebner were killed in the shooting. Wirtz was taken into custody after confirming Heydrich was indeed dead.