In the
Soviet Union, he began using the
cadre name "Hans Boden" Later, he began attending evening classes at a Moscow institute. Subsequent interrogations in the following days included abuse and torture, which began when Sobottka denied having engaged in
counter-revolutionary activity. He was called a fascist and was repeatedly pressured to sign a confession, at one point, with a pistol held against his chest. He was transferred to the
Taganka Prison infirmary, where he was surrounded by other prisoner patients who were bedridden with spinal cord injuries and other severe injuries resulting from torture, and he became convinced that his situation was hopeless. During an NKVD interrogation session on 21 April 1938, two years after the publication of their article together, other young German exiles, Max Maddalena Jr., son of another important party functionary,
Max Maddalena; and Harry Schmidt, named Hans Boden as one of the people involved in an espionage and sabotage ring. Sobottka was accused of having been "assigned"—by a leading KPD functionary—the difficult job of assassinating
Vyacheslav Molotov. and one by
Wilhelm Pieck to
Dmitry Manuilsky on April 9, 1939, recommending release for 16 people, including Sobottka, he was not released from prison. He added that if his faith in the party were shattered, the result would be his mental and physical collapse. according to some sources, from injuries sustained during torture; His parents weren't told about their son's death until the beginning of 1941. More than a decade after his death, a declaration of death was issued. Sobottka was
rehabilitated in 1956 after an examination of his case found "no incriminating evidence". == References ==