On 19 May 1945, eleven days after the fall of Nazi Germany, Přeučil was arrested in Prague as a known Gestapo agent. He was at first tried by military court, but his case was referred to the civilian People's Court in Prague. After two years of investigation he was tried by Chief Public Prosecutor Jaroslav Drábek on 3 March 1947 on charges of High Treason against Czechoslovakia, found guilty and sentenced to death. He was executed at the age of 32 by hanging at Pankrác Prison on 14 April 1947.