Cannibalism ?

Jeffrey Lionel Dahmer (May 21, 1960 – November 28, 1994) was an American serial killer and sex offender. Dahmer murdered 17 men and boys between 1978 and 1991, with the majority of the murders occurring between 1987 and 1991. His murders involved rape,dismemberment, necrophilia and cannibalism. On November 28, 1994, he was beaten to death by an inmate at the Columbia Correctional Institution, where he had been incarcerated.

Andrei Romanovich Chikatilo (Russian: Андрей Романович Чикатило, Ukrainian: Андрі́й Рома́нович Чикати́ло; 16 October 1936 – 14 February 1994) was a Soviet serial killer, nicknamed The Butcher of Rostov, The Red Ripper, and The Rostov Ripper, who committed the murder of a minimum of 52 women and children between 1978 and 1990 in the Russian SFSR. Chikatilo confessed to a total of 56 murders and was tried for 53 of these killings in April 1992. He was convicted and sentenced to death for 52 of these murders in October 1992 and subsequently executed in February 1994.