Constance Marten – The tragic case and 14-year manslaughter sentence

The case of Constance Marten and Mark Gordon has drawn international attention for its tragic outcome and unusual circumstances. In September 2025, both were sentenced to 14 years in prison for the gross negligence manslaughter of their newborn daughter, Victoria. The story involves an aristocratic background, a deliberate flight from society, and a highly publicized trial that raised questions about child protection, class, and the limits of parental freedom.

Marten, born into the wealthy Marten family, became estranged from her relatives. She met Mark Gordon, a man with a criminal record, and together they had five children. Their four older children were taken into social care, which led the couple to fear that their fifth child would also be removed. That fear set in motion a chain of events that ended in tragedy.

The couple hid the birth of their daughter Victoria in December 2022, abandoned their home, and lived off the grid in tents and sheds across England during one of the coldest winters in recent years. In January 2023, their car was found burning near Bolton. They were arrested in Brighton in late February 2023, and days later Victoria’s body was discovered in a grocery bag inside an abandoned shed. The retrial in July 2025 found them guilty of manslaughter, and the sentencing in September 2025 brought the legal proceedings to a close—though an appeal may be pending.

Who Is Constance Marten? Background and Family History

Constance Marten was born around 1987 into a prominent aristocratic family, the Martens, who have historic ties to landed estates in the UK. She was raised in privilege but later became estranged from her parents and siblings. The exact reasons for the estrangement have not been fully detailed in public court records, but the rift was significant enough that she distanced herself from family wealth and support.

Marten’s background includes a period of time living in a different social context before she met Mark Gordon. Her family home is linked to aristocratic estates, but the current location of the family property remains private. Reports mention that she has brothers, but verified public information about them is limited.

Key Insights

• Constance Marten was born into a wealthy aristocratic family (Marten family) but became estranged.
• She met Mark Gordon, a convicted sex offender, several years before the 2023 disappearance.
• The couple lived off-grid, avoiding authorities, leading to the death of their newborn.
• The trial attracted intense public interest due to the class disparity and tragic outcome.
• Supporting media coverage includes the BBC feature and a forthcoming podcast or documentary.

Case Snapshot

How Did Constance Marten and Mark Gordon Meet?

The exact circumstances of how Constance Marten and Mark Gordon met have not been publicly confirmed in detail. What is known from court records and media reports is that they met several years before the 2023 events. Gordon was a convicted sex offender with a history of violence, which later led to an extended licence term in his sentence. Marten, from a privileged background, chose to remain with him despite the known risks.

The couple had five children together. Their first four children were taken into social care, a fact that emerged during the trial. This shared experience of losing children to the state likely deepened their bond and their determination to keep their fifth child, Victoria, at all costs. The relationship was described in court as controlling and isolated, with Marten often defending Gordon against her own family.

What Were Constance Marten and Mark Gordon Convicted Of?

The couple faced two trials. The first trial, from January to June 2024 at the Old Bailey, resulted in convictions for child cruelty, concealing Victoria’s birth, and perverting the course of justice. The jury was discharged without reaching a verdict on the manslaughter charge. A retrial was ordered.

The retrial, held from March to July 2025, ended with a unanimous guilty verdict on the charge of gross negligence manslaughter. The jury found that the couple’s decision to live off the grid in freezing conditions, without adequate clothing or medical care for their newborn, amounted to a reckless disregard for life.

Sentencing Details

On September 15, 2025, Judge Mark Lucraft KC sentenced both Marten and Gordon to 14 years imprisonment for gross negligence manslaughter. In addition, Gordon received an extra four years on extended licence due to his violent past. The couple must serve two-thirds of their sentence in custody before being eligible for parole.

They also received consecutive sentences for earlier convictions: 18 months for concealing the birth, 18 months for child cruelty, and five years for perverting the course of justice. These are served concurrently with the 14-year term.

What Happened to Baby Victoria?

Victoria was born in December 2022. The couple hid her birth and immediately went on the run, crisscrossing England in taxis and staying in tents and abandoned sheds. In January 2023, their car caught fire near Bolton. They abandoned it and continued on foot. They were arrested in Brighton on February 27, 2023. Shortly after, Victoria’s body was found in a grocery bag inside a shed. The exact cause of death has not been publicly detailed beyond hypothermia and exposure.

Is Constance Marten Appealing the Conviction?

Immediately after the verdict in July 2025, Mark Gordon indicated from the dock his intention to appeal. As of the sentencing date in September 2025, no formal appeal had been lodged, but the process is expected to follow standard UK legal procedures. The couple had previously lost an appeal against their child cruelty convictions from the 2024 trial.

Whether an appeal will be filed for the manslaughter conviction remains unclear. Legal experts note that the grounds for appeal could include the judge’s directions to the jury or the admissibility of certain evidence. No official timeline has been announced.

The case has also generated interest in media coverage. A BBC feature and a forthcoming podcast or documentary are expected to explore the story in more depth. As of 2025, no full documentary has been released.

What Happened in the Constance Marten Case? A Timeline of Key Events

1. 2022: Constance Marten becomes pregnant.
2. January 2023: The couple’s car is found burning near Bolton; they go missing.
3. February 2023: The couple and baby Victoria are discovered living in a tent in Brighton.
4. February 2023: Baby Victoria is found dead; autopsy is conducted.
5. 2023–2024: Police investigation and court proceedings.
6. July 2025: Constance Marten and Mark Gordon are found guilty of gross negligence manslaughter.
7. September 2025: Both sentenced to 14 years imprisonment.

What Is Known and What Remains Unclear in the Constance Marten Case

Why Has the Constance Marten Case Attracted So Much Attention?

The case is widely described as unique and jaw-dropping due to the couple’s aristocratic background, their deliberate evasion of the state, and the bizarre nature of their trial outbursts. The stark contrast between Marten’s privileged upbringing and the squalid conditions of their life on the run captured the public imagination.

Beyond the human tragedy, the case highlights systemic issues: how social services interact with families at risk, the challenges of monitoring high-risk parents, and the legal thresholds for parental responsibility. Legal experts have noted that the conviction and sentencing set a precedent for similar cases of parental negligence leading to death.

The case also raises questions about mental health. The couple’s behavior—fleeing authorities, living in freezing conditions, and refusing help—suggests possible psychological factors that were explored during the trial but not fully resolved in public proceedings.

Key Sources and Quotes from the Constance Marten Case

The couple’s defense argued that Victoria’s death was a tragic accident, and they insisted they lived off-grid solely due to fear of social services intervention.

— The Guardian

The prosecution described the case as a tragedy of epic proportions caused by the couple’s selfish and reckless decisions.

— BBC feature

Judge Mark Lucraft KC said that the couple had failed in the most basic duty of care to their newborn child.

— Official sentencing remarks (Courts and Tribunals Judiciary)

What Is the Current Status of the Constance Marten Case?

As of September 2025, Constance Marten and Mark Gordon are serving 14-year sentences in prison. The appeal process has not yet formally begun, but Gordon’s stated intention to appeal suggests further legal proceedings. The case continues to be analyzed by legal experts, child protection professionals, and journalists. For more on similar cases, see News coverage of UK crime trials and Understanding manslaughter in UK law.

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