In October 1949, Fejgin was moved to the
Ministry of Public Security of Poland (MBP and UB), where he was appointed director of the Special Bureau (renamed in 1951 as the 10th Department), which was formed for
protecting the Party from provocateurs (in reality, the murderous persecution of political opponents and army officers from
Polish Underground State).) He was brought to trial at the end of the Stalinist period, and on 11 November 1957 sentenced to 12 years in prison for violations of human rights law and abuse of power. Charged along with co-defendants, Romkowski and
Józef Różański, Fejgin was found guilty of torturing 28 named victims during interrogations, including innocent women and
Polish United Workers' Party members. His sentence was upheld by the Supreme Court in 1958. Fejgin was kept in Racibórz. He was pardoned and released from prison on 1 October 1964, having served 8 years. In 1985 Fejgin became a member of the state-controlled veterans association, the
Society of Fighters for Freedom and Democracy (ZBoWiD), and acquired privileges of a war veteran. In 1990, however, following the collapse of the Soviet empire, he was stripped of the privileges due to his Stalinist past. Fejgin appealed this decision to the
Supreme Administrative Court of the Republic of Poland, but his claim was rejected. The court emphasized that Fejgin's post-World-War-Two activities were harmful to the Polish nation and the Polish legal system, and as such ought to be condemned. At the time of his death in 2002, Fejgin was still the subject of investigation by the
Institute of National Remembrance for the crimes he committed as an interrogator. ==Awards and decorations==