in Serbia and at the 1942 Anti-Freemason Exhibition in Belgrade the city was pronounced to be free of Jews (Judenfrei). On 1 April 1942, a Serbian Gestapo was formed. An estimated 120,000 people were interned in Nazi-run concentration camps in the occupied territory between 1941 and 1944. 50,000 to 80,000 were killed during this period. The Banjica Concentration Camp was jointly run by the German Army and Nedic's regime. Serbia became the second country in Europe, following Estonia, to be proclaimed Judenfrei (free of Jews). Approximately 14,500 Serbian Jews – 90 percent of Serbia's Jewish population of 16,000 – were murdered in World War II. Collaborationist armed formations forces were involved, either directly or indirectly, in the mass killings of Jews, Roma and those Serbs who sided with any anti-German resistance or were suspects of being a member of such. These forces were also responsible for the killings of many Croats and Muslims; however, some Croats who took refuge in the occupied territory were not discriminated against. After the war, the Serbian involvement in many of these events and the issue of Serbian collaboration were subject to historical revisionism by Serbian leaders. The following were the concentration camps established in the occupied territory: Banjica concentration camp (Belgrade) Crveni krst concentration camp (Niš) Topovske Šupe (Belgrade) Šabac concentration camp Located on the outskirts of Belgrade, Sajmište concentration camp was actually situated on the territory of the Independent State of Croatia. Post-war trials The most prominent Serbian collaborators died before they could be tried. Dimitrije Ljotić died in a car accident in Slovenia in April 1945, while Milan Aćimović was killed by Yugoslav Partisans during the Battle of Zelengora. Milan Nedić was extradited to Yugoslavia in early 1946 but died in prison before facing trial. After their arrival in Belgrade the Partisans executed Radoslav Veselinović, Dušan Đorđević, Momčilo Janković, Čedomir Marjanović and Jovan Mijušković on 27 November 1944. A group of ministers in the Nedić government were tried together as part of the same process led against Chetnik leader Draža Mihailović. Kosta Mušicki, Tanasije Dinić, Velibor Jonić, Dragomir Jovanović, and Đura Dokić were subsequently executed on 17 July 1946. Some of the members of government fled abroad and were never brought to trial. These included Kostić who moved to the United States of America, Borivoje Jonić who went to France, and Miodrag Damjanović who moved to Germany. Böhme committed suicide before being