You are mixing up Eichmann, the architect of the Holocaust, with Albert Speer, who was an architect in the original sense of the word. Speer was tried in Nurem

You are mixing up Eichmann, the architect of the Holocaust, with Albert Speer, who was an architect in the original sense of the word. Speer was tried in Nuremberg. He indeed played a "I was just an emotional artist and I never knew anything about the Holocaust" game during that trial. Given that they weren't able to disprove his assertion that he left the Posen Speech early (that was a speech in 1943 where Himmler openly discussed the Holocaust), he got away with his life, though not with his freedom. He got a 20 year sentence and served it in the Spandau Prison. (Also, he was present at the Posen Speech, which he later acknowledged in a letter.) Eichman, on the other hand, was only caught in Argentina a long time after the war, and everyone who came into contact with him described him as a pathetic mediocre personality with a strong tendency to suck up to everyone stronger, including the very Israeli commandos and jailers who held him in custody.