Male Killers

Grant Amato became infamous after murdering members of his own family inside their Florida home in 2019 following an escalating financial and psychological obsession with an online cam model. The case shocked the United States because investigators uncovered extreme levels of deception, addiction, theft and fantasy-driven behavior leading up to the killings. The murders later became one of the internet era’s most heavily discussed family annihilation cases due to the bizarre combination of online obsession, financial ruin and emotional isolation surrounding Amato’s motive. Extensive documentaries, podcasts and streaming coverage transformed the case into a major true crime phenomenon focused on digital addiction and parasocial relationships.

Herman Webster Mudgett, better known as H.H. Holmes, became one of America's earliest infamous serial killers after carrying out a series of murders during the late nineteenth century. Operating from a specially designed building in Chicago that later became known as the "Murder Castle," Holmes used deception, fraud, and false identities to lure victims. Although he confessed to 27 murders before his execution, historians believe the true number of victims remains uncertain. His case remains one of the most famous in American criminal history.

Hadden Irving Clark became one of America's most infamous convicted murderers after killing six-year-old Michelle Dorr in 1986 and Laura Houghteling in 1992. Known for his erratic behaviour, cross-dressing, and extensive claims that he committed numerous additional murders, Clark has remained a controversial figure in criminal investigations. While many of his confessions have never been corroborated, his two confirmed murders continue to attract significant attention from investigators and true crime researchers.

Harlow Cuadra was convicted of murdering Cobra Video founder Bryan Kocis in January 2007 as part of a conspiracy with Joseph Kerekes to seize control of Cobra Video and profit from the career of Sean Lockhart, better known by his stage name Brent Corrigan, whose exclusive contract with Kocis had become the centre of a bitter legal dispute. After killing Kocis inside his Pennsylvania home, Cuadra and Kerekes set the residence on fire in an attempt to destroy evidence and conceal the murder. A lengthy investigation involving DNA evidence, financial records and witness testimony ultimately exposed the conspiracy. Cuadra was convicted of first-degree murder and related offences in 2011 and sentenced to life imprisonment without the possibility of parole.

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.

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.

Ian Duncan Stewart Brady became one of the United Kingdom's most infamous serial killers after carrying out the Moors Murders with Myra Hindley between 1963 and 1965. The pair murdered five children and concealed several victims on Saddleworth Moor, creating one of the most notorious criminal cases in British history. Regarded as the dominant figure in the partnership, Brady spent the remainder of his life imprisoned and became a symbol of extreme criminality in the United Kingdom.

Ian Rich became known in Ohio criminal history after carrying out a targeted drive-by shooting on Interstate 77 that killed David Perez and seriously wounded Jacqueline Perez on April 28, 2024. Prosecutors alleged Rich deliberately followed the couple from Newburgh Heights before pulling alongside their vehicle and firing multiple gunshots. He later pleaded guilty to involuntary manslaughter, attempted murder, and firearms offences, receiving a prison sentence of 40 to 46½ years. The case attracted significant attention because of the seemingly unprovoked nature of the attack and subsequent claims regarding Rich's mental health and drug use.