Joaquín Archivaldo Guzmán Loera (Spanish: [xoaˈkin aɾtʃiˈβaldo ɣusˈman loˈeɾa]; born 4 April 1957), commonly known as "El Chapo" ([el ˈt͡ʃapo]), is a Mexican former drug lord and the former top leader of the Sinaloa Cartel. Guzmán is believed to be responsible for the deaths of over 34,000 people, and was considered to be the most powerful drug trafficker in the world until he was extradited to the United States and sentenced to life in prison.

Judias Anna Lou "Judy" Buenoano (born Judias Welty, also known as Judias Goodyear and Judias Morris; April 4, 1943 – March 30, 1998) was an American serial killer who was executed in Florida for the 1971 murder of her first husband James Goodyear. She was also convicted of the 1980 murder of her son, Michael Buenoano, and the 1983 attempted murder of her boyfriend, John Gentry.

Michel Paul Fourniret (4 April 1942 – 10 May 2021) was a French serial killer who confessed to killing 12 people in France and Belgium between 1987 and 2003. After he was arrested in June 2003 for the attempted kidnapping of a teenage girl in Ciney, Fourniret confessed in 2004 to killing nine people, eight females and one male, having been informed on by his then-wife, Monique Pierrette Olivier (born 31 October 1948).

Dorothea Helen Puente (née Gray; January 9, 1929 – March 27, 2011), also known as the Killer Landlady or the Death House Landlady, was an American serial killer and financial fraudster who murdered various tenants of the boarding house she ran in Sacramento, California, between 1982 and 1988.