Lucy Letby: One of the Longest Murder Trials in UK History and Its Legal Implications

Background

Letby worked as a neonatal nurse at the Countess of Chester Hospital. She qualified at the University of Chester in 2003 and completed specialist training in 2014, after which she was assigned to Nursery One, the ward caring for the most critically ill infants. Colleagues described her as dedicated and trustworthy. She often expressed boredom when placed in lower risk nurseries and asked to work in nursery one, a detail the prosecution later argued was linked to her attacks.

The Crown Prosecution Service alleged that Letby had a “much darker side”, while Cheshire Police noted that her “non‑descript and average” work performance allowed her to avoid suspicion. Mortality rates in the neonatal unit began to rise sharply in 2015. The first attack occurred on 8 June 2015, less than 90 minutes into her overnight shift.

The Trial

Letby faced 22 charges relating to infant deaths and attempted murders. She was convicted of 14 counts, including the murder of seven babies. The jury could not reach a verdict on four attempted murder charges.

Although she pleaded not guilty, handwritten notes found in her home contained statements such as “I am a horrible evil person” and “I killed them on purpose”. Other notes insisted on her innocence. The prosecution argued that Letby used lethal air injections on at least 12 victims. Her defence suggested alternative causes, including plumbing issues in the hospital, but the jury rejected these arguments.

The seven deaths were caused by excess milk, air, insulin or fluid. Several infants survived multiple attacks before dying. One baby survived three alleged attempts, with parents testifying that Letby intended to cause irreversible brain damage and quadriplegic cerebral palsy.

Former colleagues testified that infants deteriorated rapidly under her care. One nurse recalled saying “not again” when a baby girl became ill shortly after her twin brother had died. Letby’s supervisor also testified that she spent an abnormal amount of time with a premature baby she was not assigned to, who later died.

Another mother described finding her son, who weighed less than 3 pounds, in distress, only for Letby to dismiss her concerns. The prosecution’s evidence consistently pointed to Letby as the common factor in unexplained collapses and deaths.

Baby Anonymity

Reporting restrictions protected the identities of the 17 babies involved in the charges. The names of nine doctors and nurses who worked alongside Letby were also withheld. Two years before the trial, Mrs Justice Steyn issued an order preventing publication of any information that could identify individuals under 18. The order also protected parents who gave evidence.

Ordinarily, judges cannot restrict publication of information about deceased children. However, Steyn’s order applied because siblings and parents were witnesses. Families chose to remain anonymous, with some requesting that details such as occupation, ethnicity, nationality, and medical conditions be withheld.

Instead of using first names, each baby was assigned a letter from A to Q in chronological order.

Implications

Letby will spend the rest of her life in prison for the murder of five baby boys and two baby girls over 13 months. Some victims were twins or triplets. In one case, she murdered both twins. In another, she killed two of three triplets. In two cases she murdered one twin but failed to kill the other.

Sentencing her, Judge James Goss described her crimes as “a cruel, calculated and cynical campaign of child murder involving the smallest and most vulnerable of children”. Letby now joins Myra Hindley and Rosemary West as one of the few women in the UK subject to a whole life order.

Her refusal to attend court for sentencing prompted calls for mandatory attendance for convicted offenders. One mother described her absence as Letby’s “final act of wickedness”.