Modus Operandi - Stabbing

Paul Charles Denyer became one of Australia's most infamous serial killers after murdering three young women in Melbourne's bayside suburb of Frankston between June and July 1993. His crimes created widespread fear throughout Victoria, leading to one of the state's largest homicide investigations. Following his arrest, Denyer pleaded guilty to the murders and was sentenced to life imprisonment with a non-parole period. He remains incarcerated and is one of Australia's most notorious convicted serial killers.

Steve "Clem" Grogan was a member of Charles Manson's Family who participated in the 1969 murder of Spahn Ranch worker and stuntman Donald "Shorty" Shea. Already living and working around the ranch before becoming closely associated with Manson, Grogan joined Manson and fellow Family member Bruce Davis in the attack on Shea after Manson came to believe the ranch hand was an informant. Grogan was convicted of first-degree murder in 1971 and initially sentenced to death, but the trial judge reduced his punishment to life imprisonment. Years later, Grogan cooperated with authorities and led investigators to Shea's concealed remains. He was paroled in 1985, becoming the first Manson Family member convicted of murder to be released from prison.

Bruce McGregor Davis was a prominent member of Charles Manson's Family who was convicted for his involvement in the 1969 murders of musician Gary Hinman and Spahn Ranch worker Donald "Shorty" Shea. Davis joined Manson's group during the late 1960s and participated in crimes committed around the period of the notorious Tate-LaBianca murders, although he did not participate in those killings. After spending more than a year as a fugitive, Davis surrendered in 1970 and was convicted in 1972 of two counts of first-degree murder and conspiracy to commit murder and robbery. Originally sentenced under California's indeterminate life-sentence system, he has spent decades in prison, where he became a born-again Christian, pursued higher education and repeatedly sought parole.

Elliot Rodger was an American mass murderer responsible for the 2014 Isla Vista killings in California. He carried out a planned multi-location attack targeting individuals in a university community. He killed six people and injured others before dying by suicide at the scene.

Damian Rzeszowski was convicted of six counts of manslaughter after killing his wife Izabela, their children Kinga and Kacper, his father-in-law Marek Garstka, and family friend Marta de la Haye and her daughter Julia in St Helier, Jersey, on August 14, 2011. Rzeszowski attacked the victims with kitchen knives during a violent episode following the breakdown of his marriage. His defence successfully argued diminished responsibility caused by severe depression and psychotic symptoms, and he was cleared of murder. He was sentenced to 30 years imprisonment for each victim, to run concurrently. Rzeszowski died by suicide in prison in 2018.

Herbert William Mullin became one of California's most infamous serial killers after murdering 13 people in and around Santa Cruz between October 1972 and February 1973. Mullin later claimed he believed the killings were necessary to prevent catastrophic earthquakes, a delusion linked to severe mental illness. His short but deadly murder spree ended with his arrest in February 1973, and his case remains one of the most widely studied examples of psychosis and serial homicide in the United States.

Kyle Clifford is a British man convicted in connection with a 2024 triple homicide in Hertfordshire, England. The case involved the killing of multiple members of a family following the breakdown of a personal relationship. He was later convicted and received a whole-life sentence, meaning he will remain in prison for the rest of his life.

Jack the Ripper is an unidentified serial killer responsible for a series of murders in the Whitechapel district of London in 1888. His crimes shocked Victorian society and became one of the most infamous unsolved cases in criminal history. Operating over a short but intense period, the killer targeted vulnerable women and carried out highly violent attacks before disappearing without identification. His ability to evade capture, combined with the brutality of the crimes and widespread media attention, has cemented his place as one of history’s most enduring criminal figures.