No Further Event Killers

Christa Gail Pike was convicted of the first-degree murder of 19-year-old Colleen Slemmer in Knoxville, Tennessee, in January 1996. Pike, then 18, and her boyfriend Tadaryl Shipp lured Slemmer into a wooded area near the University of Tennessee Agricultural campus, where Pike attacked and killed her. The murder involved prolonged physical violence and the carving of a pentagram into Slemmer's body. Pike was sentenced to death and has remained on Tennessee's death row since 1996. She was scheduled for execution on September 30, 2026, which would have made her the first woman executed by Tennessee in more than 200 years.

Christian Longo became one of America’s most notorious family killers after murdering his wife and three young children before fleeing the country and assuming a new identity in Mexico. The horrifying case shocked the United States in 2001 due to the brutality of the crimes and Longo’s efforts to escape responsibility by reinventing himself as a carefree tourist while his family’s bodies were being recovered from the Oregon coast. Longo was portrayed as a manipulative conman who spent years hiding financial fraud, lies and personal failures behind the image of a devoted husband and father. His case later gained worldwide attention through books, documentaries and the film adaptation of True Story, which explored Longo’s deception, narcissism and relationship with journalist Michael Finkel.

Christopher Gregory Davis murdered his boyfriend, 56-year-old Barry Schmalbach, in Cape Coral, Florida, after Schmalbach planned to end their relationship in July 2023. Although Schmalbach's body has never been recovered, investigators built an extensive circumstantial case showing Davis using his boyfriend's financial accounts, purchasing items associated with concealing and disposing of a body, renting an isolated property under a false identity and attempting to dispose of tools. In June 2025, a Lee County jury convicted Davis of second-degree murder, tampering with evidence and eight identity-related offences. He was sentenced to life imprisonment plus 45 consecutive years.

Christopher McGowan murdered his girlfriend, Claire Inglis, in Stirling, Scotland, in November 2021 after being released on bail to live at her home despite an extensive history of violent offending. Claire had begun a relationship with McGowan unaware of his violent past, and after he moved into her home she became trapped in an escalating pattern of coercive control, abuse and violence. McGowan subjected her to a prolonged and sadistic assault before strangling her to death. In 2023, he was convicted of murder and sentenced to life imprisonment with a minimum term of 23 years.

Christopher Monks Jr. became the subject of a high-profile criminal case after conspiring to murder his adoptive parents in Kent, England, in 2009. The plot involved recruiting an online acquaintance, Shaun Skarnes, to carry out the killings while his parents slept. The attack failed when Christopher Monks Sr. awoke and disarmed the intruder before police were called. Monks was convicted of conspiracy to murder and made subject to an indefinite hospital order.

Courtney Taylor Clenney, known online as Courtney Tailor, was convicted of manslaughter after fatally stabbing her boyfriend, 27-year-old Christian “Toby” Obumseli, inside their Miami condominium on April 3, 2022. Clenney initially claimed she had acted in self-defense during a violent confrontation, but she was arrested and charged with second-degree murder. After spending four years in custody awaiting trial, Clenney accepted a plea agreement in August 2026, pleading guilty to manslaughter with a deadly weapon. She was sentenced to six years in prison, with credit for time served, followed by five years of probation.

Courtney Kelly became publicly known after being convicted in the 2012 murder of Gale Spencer during a home invasion robbery in Macon, Georgia. Prosecutors alleged Kelly participated alongside three co-defendants during the violent crime. The case generated local attention because of the multiple offenders involved in the fatal robbery. Authorities later secured convictions against all four defendants connected to Spencer’s death. Courtney Kelly ultimately received a life sentence.

Craig Mulligan became one of the United Kingdom’s most shocking juvenile killers after being convicted for his role in the murder of a five-year-old child in South Wales in 2021. The case horrified Britain because Mulligan was only 13 years old at the time of the killing, making him one of the youngest convicted murderers in modern Welsh criminal history. The investigation generated enormous public outrage after details emerged about abuse inside the household, repeated safeguarding failures and warnings allegedly ignored by authorities before the murder occurred. The case later became one of Britain’s most disturbing examples of child-on-child violence combined with systemic failures involving social services and child protection agencies.