Ondrej Rigo was a Slovak serial killer and necrophile who targeted women in Bratislava, Munich and Amsterdam from 1990 to 1992. He served a life sentence until his death for nine murders and one attempted murder in Leopoldov Prison in Slovakia. Rigo was diagnosed with a schizoid personality disorder and an antisocial personality disorder as well as necrophilia, finding pleasure in having intercourse with women with mutilated heads. Rigo remains the Slovak murderer with the highest number of victims and he is also the most prolific serial killer in modern Slovak history.

The Leopoldov Prison is a Slovak state-operated penitentiary facility located in the town of Leopoldov. Initially a 17th-century fortress built to defend against Ottoman Turks, it was converted into a high-security prison in the 19th century, and it used to be one of the largest prisons in the Kingdom of Hungary under the Habsburg monarchy. In the 20th century, it became known for housing political prisoners and dissidents under the Stalinist regime, particularly the future Communist President of Czechoslovakia Gustáv Husák, who was imprisoned after an intra-party purge.