Complex sentence: Pucci then attempted to flee to Switzerland himself, but was arrested and tortured by the Gestapo in order to extract from him information on the location of the portion of Ciano's papers that remained in Italy.
Split into simpler sentences: Pucci then attempted to flee to Switzerland himself, but was arrested by the Germans. He was tortured by the Gestapo in order to extract from him information on the location of the portion of Ciano's papers that remained in Italy.