which persisted after the fall of fascism, the resistance movement was subordinated to the interests of Allied leaders in order to maintain the status quo. Revenge killings A score-settling campaign () ensued against pro-German collaborators, thousands of whom were rounded up by the vengeful partisans. Controversially, many of those detainees were speedily court martialed, condemned and shot, or killed without trial. Minister of Interior Mario Scelba later put the number of the victims of such executions at 732, but other estimates were much higher. Partisan leader Ferruccio Parri, who briefly served as Prime Minister after the war in 1945, said thousands were killed. Some partisans, such as perpetrators of the Schio massacre, were tried by an Allied Military Court. During the waning hours of the war, Mussolini, accompanied by Marshal Graziani, headed to Milan to meet with Cardinal Alfredo Ildefonso Schuster. Mussolini was hoping to negotiate a deal, but was given only the option of unconditional surrender. His negotiations were an act of betrayal against the Germans. When confronted about this by Achille Marazza, Mussolini said, "They [the Nazis] have always treated us as slaves. I will now resume my freedom of action." With the city already held by resistance fighters, Mussolini used his connections one last time to secure passage with an escaping German convoy on its way to the Brenner Pass with his mistress Claretta Petacci. On the morning of 27 April 1945, Umberto Lazzaro (nom de guerre 'Partisan Bill'), a partisan with the 52nd Garibaldi Brigade, was checking a column of lorries carrying retreating SS troops at Dongo, Lombardy, near the Swiss border. Lazzaro recognized and arrested Mussolini. The task of executing Mussolini was, according to the official version, given to a 'Colonel Valerio' (identified as Walter Audisio) and the bodies of Mussolini and Petacci were later brought to Milan and hung upside down in the Piazzale Loreto square. Eighteen executed prominent Fascists (including Mussolini, Fernando Mezzasoma, Luigi Gatti, Alessandro Pavolini and Achille Starace) were displayed in the square; this place was significant because the bodies of 15 executed enemies of Mussolini's regime had been displayed in this square the previous year. The total number of victims of the anti-fascist terror remains unclear; it is estimated that between 12,000 and 26,000 people were killed, usually in extra-judicial executions. The outburst was particularly violent in the northern provinces; according to statistics provided by the Ministry of Interior, some