dˈʊɹɹɪŋ ðə dʒˈɜːmən ˌɑːkjʊpˈeɪʃən ʌv dˈɛnmɑːɹk fɹʌm nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi fˈaɪv, hiː wʌzðə lˈiːdɚɹ əvɚ ɹᵻsˈɪstəns ɡɹˈuːp wɪðˌɪn ðə dˈeɪnɪʃ fɹˈiːdəm kˈaʊnsəl, hˌuːz tˈæsk wʌz ɐsˈɛmblɪŋ ðə lˈɪst ʌv dˈeɪnɪʃ nˈɑːtsɪz ænd nˈɑːtsi kəlˈæboːɹˌeɪɾɚz təbi pɹˈɑːsɪkjˌuːɾᵻd ˈæftɚ ðə lˌɪbɚɹˈeɪʃən.
During the German occupation of Denmark from 1940–1945, he was the leader of a resistance group within the Danish Freedom Council, whose task was assembling the list of Danish Nazis and Nazi collaborators to be prosecuted after the liberation.