Niels Högel (born 30 December 1976) is a German serial killer and former nurse who was sentenced to life imprisonment, initially for the murders of six patients, and later convicted of a total of eighty-five murders. Estimates of Högel's alleged victim count have increased since his first conviction; as of 2020, he was believed to have claimed 300 victims in just over five years, making him the most prolific serial killer in the history of peacetime Germany, and possibly the world.

Pierre Fernand Bodein (born December 30, 1947, in Obernai) is a French criminal and spree killer who, since 1969, has alternated stays between psychiatric hospitals and prisons. Nicknamed "Pierrot le fou" meaning "Pierre the madman", his criminal record includes seven convictions, three of which are murders, including violent rapes.

Hideki Tojo (30 December 1884 – 23 December 1948) was a Japanese military officer and politician who served as Prime Minister of Japan from 1941 to 1944 during World War II. His leadership was marked by widespread state violence and mass killings perpetrated in the name of Japanese nationalism.