The Story Behind One of Britain’s Most Infamous Criminal Cases
A Family Life That Hid Terrifying Secrets
For many years, one half of Britain’s most notorious criminal partnerships lived quietly, presenting the image of an ordinary family life. Behind the closed doors of a seemingly typical home, however, a series of crimes unfolded that would later shock the nation.
Together with her husband, she became responsible for a long history of violence that included murder and sexual assault. Many of the victims were young women, and the abuse also extended to members of their own family.
Over a span of more than two decades, the couple carried out acts so brutal that they remain difficult to comprehend. Their crimes left a deep mark on the public consciousness and became one of the most disturbing criminal cases in modern British history.
To understand how this woman became one of the country’s most infamous killers, attention often turns to her early life and the circumstances that shaped her upbringing.
An Early Life That Seemed Ordinary
She was born in North Devon in 1953 and grew up with six siblings in what appeared to be a typical family household. From the outside, her parents seemed respectable members of the local community.
Her father, Bill Letts, had served aboard aircraft carriers during wartime and was known for being polite and friendly. Her mother, Daisy, was often described as quiet and soft-spoken, with neighbors noting her striking appearance and gentle manner.
At first glance, the family looked stable and ordinary. Yet beneath the calm exterior, there were already signs of deeper struggles within the household.
Before the girl was even born, her mother experienced severe depression and underwent medical treatment that would later become a point of discussion among those examining the case.
Family Struggles Behind Closed Doors
In 1950, the family moved into a council house in Northam. At that time, Daisy already had three children, and Bill’s naval service often kept him away from home for extended periods.
During these absences, Daisy reportedly struggled with emotional and psychological difficulties. Her behavior became increasingly unpredictable as she attempted to maintain a spotless household.
Neighbors and relatives later recalled that she was intensely focused on cleanliness, repeatedly scrubbing the house and bathing the children to an extreme degree.
Over time, these habits became more intense, and her emotional state continued to deteriorate.
Medical Treatment and Its Lasting Impact
In 1953, Daisy experienced a severe breakdown and was admitted to a psychiatric hospital in Bideford. There she underwent electroconvulsive therapy, a medical treatment used at the time for serious mental health conditions.
The procedure involved placing electrodes on the scalp and delivering controlled electric shocks to the brain. The treatment often caused blackouts and strong physical reactions.
At the time the treatment was administered, Daisy was pregnant with her fifth child. Despite the pregnancy, the therapy continued until only days before the baby was born.
When the child finally arrived, family members noted that she was a beautiful infant. However, they also observed unusual behavior during her early development.
Signs of Unusual Behavior in Childhood
As a baby, she reportedly spent long periods rocking her head from side to side. Her siblings later described hearing the repetitive sound of her head striking the crib during the night.
As she grew older, the movements continued. She would sometimes sway rhythmically for extended periods, appearing absorbed in her own thoughts.
These behaviors stood out to family members and hinted that her childhood might not follow a typical path.
Later accounts also suggested that her father experienced mental health difficulties, including paranoid schizophrenia.
Some reports claimed that she was subjected to sexual abuse during childhood, possibly by her father and grandfather. These allegations would later become part of discussions about her background.
Meeting the Man Who Would Become Her Husband
When she was 15 years old, she met the man who would eventually become her husband while waiting at a bus stop. He was twelve years older than her, already divorced, and had children from a previous relationship.
The relationship quickly developed into a romantic partnership. She soon became involved in caring for his daughters, taking on the role of a nanny within his household.
Although the arrangement appeared normal at first, it marked the beginning of a relationship that would later become infamous.
Her future husband had a troubled background of his own. He claimed to have suffered abuse as a child and had experienced several head injuries that he believed altered his personality.
By the time he reached his teenage years, he had already been involved in serious criminal behavior, including acts of violence and sexual assault.
The Beginning of a Disturbing Pattern
The couple married in the early 1970s, and their life together soon became defined by violence and control.
Their first child was born in 1970. However, other children in the household were not spared from abuse.
Within months of the birth, the young mother committed her first known murder. An eight-year-old girl living in the household was killed while her husband was in prison.
The child’s body was buried beneath the kitchen window of their home in Gloucester.
A Trail of Violence Over Two Decades
Beginning in 1973, the couple’s crimes expanded. They began targeting young women, often luring them to their home with offers of work as nannies.
Once inside the house, the victims were subjected to severe abuse. Many were tortured and assaulted before being murdered.
Afterward, the bodies were hidden on the property, buried in areas around the house.
The violence was not limited to strangers. The couple’s own children were also subjected to years of physical and sexual abuse.
Between 1972 and 1992, hospital records documented 31 separate admissions for injuries suffered by the children. Despite the repeated incidents, social services were never notified.
One of the most tragic cases involved their daughter Heather, who attempted to escape her parents’ control. She was murdered in 1987.
The Investigation That Uncovered the Truth
The crimes remained hidden for years until authorities received an anonymous tip connected to Heather’s concerns about her family.
Investigators began collecting statements from her siblings, and medical records confirmed a long history of injuries and suspected abuse.
Police also discovered references to a disturbing remark that had circulated as a family joke about a missing daughter being buried “under the patio.”
Initially, charges against the parents were dismissed. However, one determined detective continued to pursue the case.
A search warrant eventually allowed investigators to examine the property at 25 Cromwell Street. During the search, Heather’s remains were discovered.
Her father soon confessed to multiple murders.
Arrest and Trial
She was arrested shortly afterward on April 20, 1994. The shocking details of the investigation quickly became national news.
The couple’s names became permanently associated with the crimes that had taken place within their home.
Before the trial could begin, her husband died by suicide on January 1, 1995, leaving her to face the charges alone.
During the trial later that year, she insisted that she had been a victim of her husband’s influence and denied involvement in the murders.
Witnesses including family members and survivors provided testimony describing the abuse that had taken place in the household.
One survivor who had escaped a previous assault also appeared in court.
Her defense team argued that she had been manipulated by her husband, pointing to the age difference when they first met and the control he allegedly exercised.
Prosecutors, however, argued that it was impossible for her to have lived in the same house without knowing about the crimes.
Conviction and Sentencing
After seven weeks of testimony and evidence, the jury delivered its verdict.
She was found guilty on ten counts of murder and sentenced to life imprisonment without the possibility of parole.
Despite the conviction, she has consistently maintained that she is innocent and has filed several appeals, all of which were rejected.
The house at 25 Cromwell Street, where many of the crimes occurred, was demolished in October 1996.
Life in Prison
Today she remains incarcerated at HM Prison New Hall in West Yorkshire. Her daily routine includes listening to music, playing board games, and teaching cross-stitch to other inmates.
Over the years, she has been transferred between different prisons. One relocation reportedly occurred after authorities discovered a plot to harm her.
The case continues to attract attention decades later, particularly through documentaries and media coverage examining the events.
The Lasting Impact on the Family
The surviving children of the couple have carried the emotional burden of the crimes for many years.
After their parents were arrested, all five underage children were placed into protective custody.
One of the daughters, Anna Marie, later testified in court about the abuse she and her siblings experienced.
In later years, it was reported that the siblings remain distant from one another despite living relatively close by.
The trauma associated with their upbringing has made maintaining relationships difficult, as contact can reopen painful memories.
Although public interest in the case resurfaces from time to time, the individuals most affected continue to live with the consequences of what occurred inside that house.