from the backyard of Luburić's villa, many of which belonged to children, was documented by a Soviet film crew. Another witness to the aftermath of Luburić's crimes was the American journalist Landrum Bolling, who recalled seeing a roomful of bodies "stacked like cordwood on top of one another." Many of the cadavers showed signs of torture and mutilation. Among the corpses was that of Halid Nazečić, whose head had been mutilated, eyes gouged out and genitals burned with boiling water. Destruction of the NDH Upon leaving Sarajevo, Luburić boarded a plane for Zagreb. While attempting to land at the Borongaj airfield, Luburić's plane crashed on a bomb-damaged runway. Luburić sustained a head injury and had to be hospitalized. Pavelić visited Luburić while he was convalescing and found his subordinate jaded and disillusioned, accusing the Germans of betraying Croatia. Shortly thereafter, Luburić was promoted to the rank of General. In early April, he ordered that Jasenovac's remaining prisoners be killed. He also ordered that documents pertaining to the camp's operation be destroyed, and the corpses from surrounding mass graves exhumed and cremated. Several individuals who possessed incriminating information pertaining to Luburić's wartime activities, such as the Gestapo agent Koppel, were killed at his behest. In late April, Luburić approved the executions of Lorković and Vokić, as well as others who had been implicated in the Lorković–Vokić plot. As the Partisans neared, Luburić suggested that the Ustaše make their last stand in Zagreb, but Pavelić refused. The Ustaše were divided as to what to do. Some proposed retreating towards Austria as quickly as possible. Others, Luburić foremost among them, advocated establishing irregular formations in the countryside that would carry out guerrilla attacks following the NDH's demise. In early May, Luburić met with the Archbishop of Zagreb, Aloysius Stepinac, who implored him not to put up armed resistance against the Partisans. On 5 May, the government of the NDH left Zagreb, followed by Pavelić. By 15 May, the NDH had completely collapsed. Tens of thousands of Ustaše surrendered to the British Army but were handed back to the Partisans. An untold number were killed in subsequent Partisan reprisal killings, together with several thousand Serbian and Slovenian collaborationists. Some Ustaše, who came to be known as Crusaders (), remained in Yugoslavia and carried out guerrilla attacks against the communists. Among these was a small group of fighters led by Luburić, which remained in the