Complex sentence: After WWII, he was condemned as a war criminal by the Romanian People's Tribunals, however, in spite of support to these accusations from the Wiesenthal Center, United States authorities refused to extradite Wass to Romania claiming the lack of solid evidence.
Split into simpler sentences: After WWII, he was condemned as a war criminal by the Romanian People's Tribunals. In spite of support to these accusations from the Wiesenthal Center, United States authorities refused to extradite Wass to Romania claiming the lack of solid evidence.