Ondrej Rigo (born 17 December 1955) is a Roma serial killer and necrophile who targeted women in Bratislava, Munich and Amsterdam from 1990 to 1992. Currently serving a life sentence for nine murders and one attempted murder in Leopoldov Prison in Slovakia, Rigo has been 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.