Grzegorz Przemyk, an 18-year-old aspiring poet from Warsaw, died on 14 May 1983 from injuries inflicted by officers of Poland's Citizens' Militia (Milicja Obywatelska) two days earlier. He was the only child of Barbara Sadowska, a poet and member of the opposition Workers' Defence Committee who had been repeatedly questioned and threatened by the communist-era Security Service in the weeks before his death.
On 12 May 1983, the day of Przemyk's high school graduation, he and four friends went to Warsaw's Castle Square to celebrate. After Przemyk jumped on the shoulders of his friend Cezary Filozof and the pair fell to the sidewalk, a nearby police patrol took notice. Officer Ireneusz Kościuk stopped Przemyk and Filozof, and after they did not produce identification, had them taken to a police station, beating them with a rubber baton along the way. Filozof later testified that at the station Kościuk beat Przemyk with a baton and that duty officer Arkadiusz Denkiewicz told the officers present to strike Przemyk in the stomach instead, so as to leave no visible marks; Przemyk was beaten until he lost consciousness.
An ambulance crew took Przemyk to a hospital, where psychiatrist Paweł Willmann examined him and recommended further observation, saying he would “soon get better”; Przemyk's mother instead took him home, fearing mistreatment at psychiatric facilities. His condition worsened the next day, and doctors operating on him overnight found severe, irreversible gastrointestinal perforation. Przemyk died in intensive care at 1 p.m. on 14 May 1983.
Przemyk's funeral on 19 May at Warsaw's Powązki Cemetery, officiated by the priest Jerzy Popiełuszko, drew tens of thousands of mourners and became a silent demonstration against the communist government. Polish state media largely omitted or misrepresented the case, while it was reported internationally by outlets including the BBC and Voice of America.
Interior Minister Czesław Kiszczak directed a monthslong effort to shift blame for Przemyk's death away from the police, including surveillance and pressure campaigns against witnesses and the victim's family. Prosecutors ultimately indicted policemen Kościuk and Denkiewicz over the beating, doctors Bronisław Jasicki and Paweł Willmann for negligence, and paramedics Michał Wysocki and Jacek Szyzdek, whom an internal investigation had already found could not have caused Przemyk's injuries. A trial opened on 31 May 1984; on 16 July, judges acquitted Kościuk and Denkiewicz, found the two doctors guilty of non-intentional negligence without punishment, and convicted the paramedics to two years in prison. The paramedics were released within about a month under amnesty, and their convictions were formally invalidated in 1989 after the fall of the communist government.
The case was reopened in 1993 with Przemyk's father, Leopold Przemyk, as subsidiary prosecutor. Proceedings against the surviving police defendants continued for years before most were dismissed as time-barred in 2010, leaving Denkiewicz as the only person ultimately convicted. A separate prosecution of Kiszczak over his role in obstructing the original 1983 investigation was also dismissed in 2012, after years of legal proceedings. In 2013, the European Court of Human Rights ruled that Poland's investigations in the case had not been intentionally delayed. Przemyk was posthumously awarded Poland's Knight's Cross of the Order of Polonia Restituta in 2008.