At the beginning of May 1945, Kren left Zagreb. He evaded capture by the
Yugoslav Partisans and escaped across the border into Italy. He was captured by the
Allied forces there and placed in a prisoner-of-war camp in
Grumo Appula, near
Bari. He was then transferred to a camp in
Grottaglie, where he remained until 1947. That year, Kren escaped from Allied custody while being transported to another prisoner-of-war camp. Kren went to
Rome, where he hid for a few months. In March 1947, British intelligence discovered that Kren was staying in
Genoa under the protection of Monsignor Karlo Petranović and that he was planning to leave for Argentina under the
alias Marko Rubini. Kren was arrested by British authorities on 4 March 1947 while attempting to board a ship called
Philippa, which regularly carried suspected Croatian war criminals along the Genoa–
Buenos Aires route. Eight other suspected war criminals were arrested alongside him. Kren was extradited to
Yugoslavia later in March. He was tried in Zagreb, and on 22 October 1948 the city's municipal court found him guilty of
mass murder,
terrorism, forced mobilization, forced religious conversion, aerial bombardment of civilian areas, and the forced expulsion of civilians. He was sentenced to death by
firing squad. Kren appealed the decision to the supreme court of the
Socialist Republic of Croatia, but his appeal was dismissed on 9 November 1948. He was executed in Zagreb on 2 December 1948. In 2011, his granddaughter submitted an unsuccessful request for rehabilitation to the Zagreb District court. ==Explanatory notes==