British Child Killers

Overview
The killing of a child is among the most serious crimes documented in Britain, with cases arising from a wide range of circumstances. Offenders have included family members, acquaintances, partners, and strangers, while the crimes themselves have occurred in homes, public places, and other settings.
CrimeTrakr's collection focuses on the offenders behind these cases, bringing together their backgrounds, the circumstances surrounding the killings, investigative developments, and available information about the legal outcomes.
Historical Context
British child homicide cases span many decades, during which approaches to child protection, policing, forensic investigation, and the prosecution of serious offences have changed considerably. Earlier investigations relied on evidence-gathering methods that were far more limited than those available to modern detectives.
Contemporary cases can benefit from DNA analysis, digital evidence, surveillance, specialist investigative teams, and improved information sharing. Examining cases across different periods highlights both these changes and the enduring challenges involved in investigating crimes against children.
What You'll Find
Profiles in this collection may contain:
- Background information about British child killers.
- Details of victims and the circumstances of their deaths.
- Police investigations and important evidence.
- Court proceedings, convictions, and sentencing outcomes.
- Related case files, videos, and other CrimeTrakr resources.
The collection will continue to develop as further British offenders and their associated cases are documented.
Browse profiles of British offenders responsible for killing children, with information covering their backgrounds, victims, crimes, investigations, court proceedings, convictions, sentencing outcomes, and related true crime material.
British Child Killers Listings

John Cole
John Cole became one of the United Kingdom's most reviled child killers after murdering five-year-old Logan Mwangi alongside his stepfather, Angharad Williamson, in Bridgend, South Wales, in 2021. Logan suffered prolonged abuse before being fatally assaulted and his body was abandoned in a nearby river. Following a high-profile trial, Cole was convicted of murder despite being only 14 years old at the time of the offence, making him one of the youngest people convicted of murder in modern Welsh criminal history.
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Craig Mulligan
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.

Angharad Williamson
Angharad Williamson became one of the United Kingdom's most reviled child killers after murdering her two young sons, John Paul Bennett and Jake Bennett, alongside her partner, Jamie Barrow, in South Wales in 2020. The boys endured prolonged abuse before being killed inside their family home. Following a high-profile trial, Williamson and Barrow were convicted of murder and sentenced to life imprisonment, with the case prompting renewed calls for stronger child protection measures.

Aaron Campbell
Aaron Campbell became one of Scotland's most infamous child killers after abducting and murdering seven-year-old Megan Montgomery in Airdrie, North Lanarkshire, in 2020. Campbell lured the child from outside her home before killing her and concealing her body in nearby woodland. Following an extensive police investigation, he was convicted of murder and sentenced to life imprisonment with one of the longest minimum terms imposed in Scotland for the murder of a child.