1945 he had arrived in Warsaw and begun organizing an intelligence gathering network. As the NIE organization had been disbanded, Pilecki recruited former ZOW and TAP members and continued sending information to the government-in-exile. To maintain his cover identity, Pilecki lived under various assumed names and changed jobs frequently. He worked as a jewellery salesman, a bottle label painter, and as the night manager of a construction warehouse. However, in July 1946 he was informed that his identity had been uncovered by the Ministry of Public Security. Anders ordered him to leave Poland, but Pilecki refused. In early 1947 his superiors rescinded the order. Arrested on 8 May 1947 by the communist authorities, Pilecki was tortured, but in order to protect other operatives, he did not reveal any sensitive information. His case was supervised by Colonel Roman Romkowski. A show trial, chaired by Lieutenant Colonel , took place on 3 March 1948. Pilecki was charged with illegal border crossing, use of forged documents, not enlisting with the military, carrying illegal arms, espionage for Anders, espionage for "foreign imperialism" (government-in-exile), and planning to assassinate several officials of the Ministry of Public Security of Poland. Pilecki denied the assassination charges, as well as espionage, although he admitted to passing information to the II Corps, of which he considered himself an officer and thus claimed that he was not breaking any laws. He pleaded guilty to the other charges. He was sentenced to death on 15 May with three of his comrades. Pleas for pardon from a number of Auschwitz survivors were ignored; one of their recipients was Polish Prime Minister Józef Cyrankiewicz, also an Auschwitz survivor. Cyrankiewicz, who had already testified at the trial, instead wrote that Pilecki must be treated harshly as an "enemy of the state". Subsequently, on 25 May 1948, Pilecki was executed by Piotr Śmietański with a shot to the back of the head at the Mokotów Prison in Warsaw. Several of Pilecki's affiliates were also arrested and tried around the same time, with at least three executed as well; a number of others received death sentences that were changed to prison sentences. Pilecki's burial place has never been found, though it is thought to be in Warsaw's Powązki Cemetery. Legacy Pilecki's life has been a subject of several monographs. The first in English was Józef Garliński's Fighting Auschwitz: The Resistance Movement in the Concentration Camp (1975), followed