with senior German police and members of the Belgrade Special Police (, SP UGB), a collaborationist political police organisation that had been established in mid-May by Jovanović, who was now the German-appointed administrator of Belgrade. The conference decided to undertake a comprehensive preemptive campaign against the communists. The camp was formally established prior to 22 June 1941, documented by a letter of that date from Turner to Aćimović. Responsibility for establishing the camp fell to Turner's deputy, SS-Sturmbannführer Georg Kiessel, who was responsible for overseeing Jovanović. In addition to his role as the administrator of Belgrade, Jovanović was also the chief of Serbian State Security for Aćimović's puppet regime. A three man committee was created to determine the site for the camp. The committee consisted of Jovanović's deputy city administrator, Miodrag Đorđević, the chief engineer of Belgrade, Milan Janjušević, and an unnamed representative of the Gestapo. The committee chose the former barracks of the Royal Yugoslav Army's 18th Infantry Regiment, located in the Belgrade suburb of Banjica. Once the site was identified, the buildings had to be prepared for receiving a large number of prisoners, and secured against escape. Jovanović had overall responsibility for this work, with Janjušević managing the work at the camp. The former chief of the anti-communist section of the interwar Belgrade General Police, Svetozar Vujković, was appointed as the administrator of the camp, and he, his staff, and his German supervisors took over the camp on 5 July. The camp admitted its first inmates on 9 July, while building works were still ongoing. The first prisoners were held in one large basement room. For the first two months of its operation, the camp was surrounded by a barbed wire fence. As this was considered inadequate to prevent escape, Jovanović ordered Janjušević to build a masonry wall around the camp. In early September, construction commenced on the wall and a guardhouse. The wall was completed within a month, and was high, enclosing the camp in the form of a pentagon, with towers set at each corner in which machine guns and searchlights were mounted. The camp was divided into sections, with one part for Gestapo prisoners, another for those arrested by the SP UGB, and a third area which held a mixed group of prisoners when either or both of the other two sections were at capacity. After the war, while he was being interrogated, Jovanović explained