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Countess of Chester Hospital neonatal unit murders

SOLVED2015Countess of Chester Hospital, Chester, England3 SOURCESUPDATED JUL 2026
Illustrative

Lucy Letby, born 4 January 1990 in Hereford, England, is a British former neonatal nurse who worked in the Countess of Chester Hospital's neonatal unit from January 2012. Between June 2015 and June 2016, the unit recorded an unusual cluster of infant collapses and deaths, compared with its usual two or three deaths a year. Letby was charged in November 2020 with seven counts of murder and fifteen counts of attempted murder relating to seventeen infants. In August 2023, a jury at Manchester Crown Court found her guilty of seven counts of murder and seven of attempted murder, acquitted her on two counts, and could not reach verdicts on six others; a 2024 retrial produced a conviction on one further attempted-murder count.

Concerns were first raised internally in 2015 by unit manager Eirian Powell and lead neonatologist Stephen Brearey; the trust initially classified the deaths as medication errors. After further deaths in June 2016, consultants asked management to remove Letby from clinical duties, and she was reassigned to non-clinical duties the following month. A subsequent review by the Royal College of Paediatrics and Child Health found no definitive explanation for the elevated mortality rate. Consultants, including Brearey and Ravi Jayaram, later contacted Cheshire Constabulary, and the hospital publicly confirmed police involvement in May 2017 as Operation Hummingbird. Letby was arrested in July 2018 and charged in November 2020.

At trial, prosecutors cited Letby's presence during the incidents, two blood test results interpreted as evidence of insulin poisoning, skin discolouration said to indicate air embolism, alleged irregularities in medical records, nursing handover sheets found at her home, and handwritten notes — including "I killed them on purpose because I'm not good enough to care for them," alongside others stating "I haven't done anything wrong" — which prosecutors characterised as a partial confession and the defence attributed to emotional distress. Letby denied all charges, testifying that staffing and care problems, not deliberate harm, explained the collapses; her only other defence witness was a plumber who described recurring plumbing problems. On 21 August 2023 she was sentenced to a whole life order, and a fifteenth such order followed her 2024 retrial conviction; she was struck off the nursing register in December 2023.

The Court of Appeal refused permission to appeal her original convictions in May 2024 and her retrial conviction in October 2024. A UK government inquiry chaired by Lady Justice Thirlwall was upgraded to a statutory inquiry in August 2023 and began public hearings in September 2024; as of April 2026 its report remained unpublished. Police continued investigating other cases at the Countess of Chester Hospital and Liverpool Women's Hospital, where Letby had also worked, but the Crown Prosecution Service announced on 20 January 2026 that no further charges would be brought. Three former senior hospital leaders were arrested on suspicion of gross negligence manslaughter in July 2025, and inquests into five of the infants' deaths opened in February 2026.

Since reporting restrictions lifted, several medical, statistical and scientific experts have questioned the trial evidence. In February 2025, a panel of fourteen international medical experts convened by neonatologist Shoo Lee found the deaths and collapses consistent with natural causes or substandard care, with no evidence of deliberate harm; her legal team applied to the Criminal Cases Review Commission the same day. Statistician Jane Hutton and others have separately criticised the shift-pattern data presented to the jury. The prosecution's lead expert witness, Dewi Evans, has rejected these criticisms. The Court of Appeal has rejected every challenge brought to date, and the Criminal Cases Review Commission's review remained pending.

Key facts

Victims
Baby E, Child O
Date
2015
Location
Countess of Chester Hospital, Chester, England
Case status
solved

Case timeline

  1. 1990-01-04

    Lucy Letby is born in Hereford, England.

  2. 2012-01-02

    Letby begins work as a registered nurse in the neonatal unit at the Countess of Chester Hospital.

  3. 2015-06

    An unusual cluster of infant collapses and deaths begins on the unit, including four collapses, three of them fatal, that month.

  4. 2016-06-24

    After two further deaths, lead neonatologist Stephen Brearey asks a hospital executive to remove Letby from clinical duties; he is told she is safe to work.

  5. 2016-06-30

    Letby is taken off the neonatal unit.

  6. 2017-05

    The hospital trust publicly confirms police involvement in the case, an investigation named Operation Hummingbird.

  7. 2018-07-03

    Letby is arrested for the first time, on suspicion of eight counts of murder and six counts of attempted murder.

  8. 2020-11

    Letby is charged with seven counts of murder and fifteen counts of attempted murder relating to seventeen infants and is later remanded in custody.

  9. 2022-10-10

    Letby's trial opens at Manchester Crown Court.

  10. 2023-08-18

    The jury delivers its verdicts: guilty on seven counts of murder and seven of attempted murder, acquitted on two counts, and unable to reach verdicts on six further counts.

  11. 2023-08-21

    Letby is sentenced to a whole life order, becoming the fourth woman in the United Kingdom to receive one.

  12. 2023-11-22

    The Thirlwall Inquiry, examining the hospital trust's response to clinicians' concerns, formally opens.

  13. 2023-12-12

    Letby is struck off the nursing register by the Nursing and Midwifery Council.

  14. 2024-05

    The Court of Appeal refuses Letby permission to appeal her original convictions.

  15. 2024-07-02

    At retrial, Letby is found guilty of one further count of attempted murder.

  16. 2024-07-05

    Letby receives a fifteenth whole life order.

  17. 2025-02-04

    A panel of 14 international medical experts convened by Shoo Lee releases findings concluding there is no medical evidence of deliberate harm; Letby's legal team applies to the Criminal Cases Review Commission.

  18. 2025-07-01

    Three former members of the hospital's senior leadership team are arrested on suspicion of gross negligence manslaughter.

  19. 2026-01-20

    The Crown Prosecution Service announces that no further charges will be brought against Letby.

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People

  • Paul Hughes

    LAW ENFORCEMENT

    Senior Investigating Officer for Cheshire Police's Operation Hummingbird, the investigation opened in 2017 into the deaths and collapses on the Countess of Chester Hospital's neonatal unit.

  • Baby E

    VICTIM

    Infant on the Countess of Chester Hospital neonatal unit; per trial evidence, collapsed and died the same day after Letby had been present, prompting a related count against her. Identified in court proceedings only by the anonymized designation "Baby E."

  • Lucy Letby

    CONVICTED

    British former neonatal nurse; charged in November 2020 with seven counts of murder and fifteen counts of attempted murder relating to seventeen infants at the Countess of Chester Hospital. Convicted in August 2023 on seven counts of murder and seven of attempted murder (acquitted on two counts; no verdict reached on six); convicted in July 2024, after a retrial, of one further count of attempted murder. Sentenced to 15 whole life orders in total and struck off the nursing register in December 2023. Two Court of Appeal applications for permission to appeal have been refused, and a preliminary application to the Criminal Cases Review Commission is pending.

  • Child O

    VICTIM

    Infant on the Countess of Chester Hospital neonatal unit whose post-mortem liver injury formed the basis of one of the counts against Letby, on which the jury returned a unanimous verdict. Identified in court proceedings only by the anonymized designation "Child O."

Roles reflect public records and court outcomes at the time of writing — supporting citations are on file under Sources.

Places

Countess of Chester Hospital, Chester, England

53.1934, -2.8931

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Common questions

What happened to the victim?
A British neonatal nurse, Lucy Letby, was found guilty at trial in August 2023 of seven counts of murder and seven of attempted murder against infants on the Countess of Chester Hospital's neonatal unit between June 2015 and June 2016, with an eighth attempted-murder count added after a 2024 retrial; she received 15 whole life orders in total, though an international panel of medical experts and a pending Criminal Cases Review Commission application have since challenged the safety of her convictions.
Where did the murders happen?
Countess of Chester Hospital, Chester, England.
Who was convicted?
Lucy Letby (British former neonatal nurse; charged in November 2020 with seven counts of murder and fifteen counts of attempted murder relating to seventeen infants at the Countess of Chester Hospital. Convicted in August 2023 on seven counts of murder and seven of attempted murder (acquitted on two counts; no verdict reached on six); convicted in July 2024, after a retrial, of one further count of attempted murder. Sentenced to 15 whole life orders in total and struck off the nursing register in December 2023. Two Court of Appeal applications for permission to appeal have been refused, and a preliminary application to the Criminal Cases Review Commission is pending.).
What is the current status of the case?
Status: solved.
More cases in England

Sources

  1. ENCYCLOPEDICLucy LetbyWikipedia · 2026-07-12
  2. PRESSContemporaneous coverage — The GuardianThe Guardian · 2026-07-12
  3. PRESSContemporaneous coverage — BBC NewsBBC News · 2026-07-12

Record history

First published
JUL 13, 2026