Hunting Grounds - Parks

Robert Clive Napper became one of the United Kingdom's most infamous serial killers after murdering Rachel Nickell in 1992 and Samantha Bisset and her four-year-old daughter, Jazmine, in 1993. Before his identification, Napper committed numerous violent sexual assaults across South East London, becoming known as the "Green Chain Rapist." Advances in DNA profiling eventually linked him to the murders after years of investigative failures, making his case one of Britain's most significant forensic breakthroughs.

Harold Frederick Shipman became one of the most prolific serial killers in modern history after murdering patients under his care while working as a general practitioner in England. Convicted of 15 murders in 2000, a subsequent public inquiry concluded he had likely killed at least 215 patients, with some estimates suggesting the true total exceeded 250. Shipman's abuse of trust, combined with the enormous scale of his crimes, fundamentally changed patient safety, death certification, and medical oversight throughout the United Kingdom.

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.

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.

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.

The Zodiac Killer is an unidentified serial killer who operated in Northern California during the late 1960s and early 1970s. He is linked to multiple murders and attacks, primarily targeting young couples in secluded areas. The case became widely known due to the killer’s cryptic letters and ciphers sent to newspapers, in which he claimed responsibility and taunted law enforcement. Despite extensive investigation, his identity remains unknown, making him one of the most infamous unsolved serial killers in history.

Neil Entwistle murdered his wife, Rachel Entwistle, and their nine-month-old daughter, Lillian Rose Entwistle, at their home in Hopkinton, Massachusetts, in January 2006. After shooting both victims with a stolen handgun, Entwistle fled to his native England, initially claiming he had discovered the bodies before leaving the United States. Investigators quickly uncovered evidence contradicting his account, leading to his arrest in London and extradition to Massachusetts. In 2008, a jury convicted Entwistle of two counts of first-degree murder, and he was sentenced to life imprisonment without the possibility of parole.

Ivan Milat was an Australian serial killer responsible for the murders of multiple backpackers in New South Wales between 1989 and 1992. His crimes became one of the most notorious cases in Australian criminal history. Milat targeted travellers and used deception to gain their trust before carrying out violent attacks. He was later convicted and sentenced to life imprisonment without parole, remaining incarcerated until his death in 2019.