Mark Riebe
Mark Riebe is an American man convicted of the murder of a young woman in Florida in 1998, a case that remained unsolved for years before being reopened with new evidence. He was later linked to the killing through advances in forensic investigation. Riebe was convicted and sentenced to life imprisonment. His case highlights how cold cases can eventually be solved through persistence and improvements in investigative techniques.
Mark Rust
Mark Rust is currently incarcerated for two counts of murder, notably for the murder of Maya Jakic in 1999.
Mark Twitchell
Mark Twitchell is the individual identified as a killer, known for being accused and convicted of abducting and murdering Alberta farmer Johnny Altinger in 2008.
Marshall Applewhite
Marshall Applewhite was the leader of the Heaven's Gate cult, which culminated in the mass suicide of its members in 1997
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.