Marshall Applewhite
Marshall Applewhite was the leader of the Heaven's Gate cult, which culminated in the mass suicide of its members in 1997

Marshella Chidester
Marshella Chidester is an American woman convicted in connection with a fatal vehicle incident in Michigan in 2024. The event occurred when she drove into a building during a private gathering, resulting in multiple deaths and injuries. The case gained national attention due to the circumstances of the incident and the loss of young lives. Chidester was later convicted and sentenced to a lengthy prison term.

Martin Bryant
Martin Bryant became Australia’s most notorious mass murderer after carrying out the Port Arthur massacre in Tasmania on April 28, 1996. Armed with semi-automatic rifles, Bryant killed 35 people and injured 23 others across multiple locations around the historic Port Arthur tourist site, making it the deadliest mass shooting in modern Australian history. The massacre shocked Australia and triggered sweeping national gun law reforms under Prime Minister John Howard. Bryant’s name became permanently associated with mass casualty violence, firearm legislation, and public trauma across the country. The scale of the killings, the randomness of the victims, and the horrifying duration of the attack turned the Port Arthur massacre into one of the most historically significant crimes in Australian history.
Mary Ann Cotton
Mary Ann Cotton is a notorious Victorian Era serial killer, known as 'The Black Widow', who poisoned multiple family members.
Mary Bell
British child who was convicted for the murder of two young boys in Newcastle upon Tyne, England, in 1968
Matthew Falder
Matthew Falder is a convicted UK sex offender who was found guilty of multiple counts of sexual abuse, exploitation, and blackmail in 2019.
Mel Ignatow
Mel Ignatow is known as the 'Chloroform Killer', a notorious criminal convicted for multiple murders in the mid-1970s.