Štrougal became the prime minister of Czechoslovakia on 28 January 1970.[6] In the 1980s, he supported perestroika, the reform process initiated by Soviet President Mikhail Gorbachev. He resigned as prime minister on 12 October 1988 due to conflicts with Communist Party chairman Miloš Jakeš, a hard-liner. Following the Velvet Revolution of 1989, Štrougal decided to retire from politics; he was ultimately expelled from the party in February 1990.[4][5][6]
The Office for the Documentation and the Investigation of the Crimes of Communism Police of the Czech Republic (UDV) alleged that, in 1965, Štrougal had prevented investigation of crimes conducted by the communist State Security in the late 1940s. Štrougal was acquitted of the charge in July 2002. In 2022, Štrougal was again put on trial, along with former Interior Minister Vratislav Vajnar [cs], for ordering the killing of citizens trying to cross the border into the west. However, experts from the psychiatric hospital where he was being treated said he was suffering from mild dementia and could not comprehend the court proceedings. Regardless, Štrougal claimed that the killings were not his responsibility.[4][7] Štrougal died on 6 February 2023, at the age of 98.[5][8]
^Blažek, Vojtěch; Gavenda, Jaroslav; Stuchlíková, Lucie (6 January 2023). "Zemřel expremiér Lubomír Štrougal". Seznam Zprávy (in Czech). Retrieved 6 January 2023.