Doctor Leech

Dr. Leech: 1942, USA Comics #4. Dr. Gustave Leech is billed as the Nazi scientist of "sudden death". Bald-headed and with a monocle, he heads a Nazi spy ring in the South American country Arbolivia as well as commanding a submarine. With which, he destroys cargo ships carrying food and such to the country, hoping to ultimately sway the country to the Fatherland's side. He's apparently killed when his submarine is destroyed by Captain Terror.