A fresh report by a group of pediatric doctors and forensic specialists challenges the credibility of insulin tests crucial to Lucy Letby’s conviction, prompting her legal team to seek a review of her case due to potential miscarriages of justice.
Controversial Insulin Evidence in Letby Case Under Scrutiny

Controversial Insulin Evidence in Letby Case Under Scrutiny
Experts raise significant concerns about the reliability of insulin tests used in the conviction of Lucy Letby for infant murders.
Article Text:
Seven pediatric doctors and toxicology experts have voiced significant doubts about the reliability of insulin tests that played a central role in the prosecution of Lucy Letby, a nurse sentenced to life imprisonment for the murders of seven babies at a UK hospital. This revelation comes from a new report presented by Ms. Letby’s lawyer to the Criminal Cases Review Commission (CCRC), which investigates possible miscarriages of justice.
In their assertions, the experts, which include a forensic toxicologist and a professor specializing in forensic science, critiqued the prosecution’s reliance on the alleged proof of insulin poisoning during the trial. Their report questions the validity of the evidence submitted regarding insulin and C-peptide tests, claiming it could "significantly undermine" the prosecution’s case.
Ms. Letby maintains her innocence amidst ongoing concerns regarding the integrity of her convictions. Following her two trials in 2023, discussions have arisen, including a detailed analysis published in an extensive piece in The New Yorker. Despite these emerging doubts about her guilt, attempts by her defense team to reopen the case for a full appeal have consistently faced rejection.
The implications of this expert report may prompt a reevaluation of Letby's case, as the focus shifts to the processes surrounding the collection and interpretation of medical evidence in high-stakes legal proceedings.
Seven pediatric doctors and toxicology experts have voiced significant doubts about the reliability of insulin tests that played a central role in the prosecution of Lucy Letby, a nurse sentenced to life imprisonment for the murders of seven babies at a UK hospital. This revelation comes from a new report presented by Ms. Letby’s lawyer to the Criminal Cases Review Commission (CCRC), which investigates possible miscarriages of justice.
In their assertions, the experts, which include a forensic toxicologist and a professor specializing in forensic science, critiqued the prosecution’s reliance on the alleged proof of insulin poisoning during the trial. Their report questions the validity of the evidence submitted regarding insulin and C-peptide tests, claiming it could "significantly undermine" the prosecution’s case.
Ms. Letby maintains her innocence amidst ongoing concerns regarding the integrity of her convictions. Following her two trials in 2023, discussions have arisen, including a detailed analysis published in an extensive piece in The New Yorker. Despite these emerging doubts about her guilt, attempts by her defense team to reopen the case for a full appeal have consistently faced rejection.
The implications of this expert report may prompt a reevaluation of Letby's case, as the focus shifts to the processes surrounding the collection and interpretation of medical evidence in high-stakes legal proceedings.