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Experts Question Validity of Insulin Test in Lucy Letby Case

A new report presented to Britain's Criminal Cases Review Commission raises concerns over the reliability of insulin test results that influenced the conviction of nurse Lucy Letby.

By Michael D. ShearSource: nytimes.com1 min read
Experts Question Validity of Insulin Test in Lucy Letby Case
Image via nytimes.com

In brief

Seven pediatric doctors and toxicology experts have challenged the insulin testing used in the trial of Lucy Letby, who was convicted of murdering infants. Their report, submitted to the Criminal Cases Review Commission, argues that the evidence was misleading and undermines the prosecution's case.

Seven pediatric doctors and toxicology experts have raised serious concerns about the insulin test results that were crucial to the conviction of nurse Lucy Letby, who was sentenced to 15 life terms for murdering seven infants in a British hospital. The newly submitted report, presented to the Criminal Cases Review Commission, claims jurors were misled about the reliability of the test used during the trial.The report counters the prosecution's argument that Letby had intentionally poisoned the infants with insulin, asserting that the validity of the tests presented significant issues. The group, which includes a forensic toxicologist and experts in forensic science and endocrinology, indicated in their summary that the evidence against Letby was significantly compromised. Letby, who consistently maintains her innocence, was convicted in 2023 of deliberately inflicting harm on the babies, which allegedly included injecting air, overfeeding them, and using insulin as a poison. As her legal team aims to appeal the decision, scrutiny of the evidence against her has intensified, including widespread media coverage and specific articles highlighting potential miscarriages of justice.Despite her team’s repeated attempts to reopen her case, appeals have so far been denied. The report now stands as a pivotal piece of evidence in the ongoing debate surrounding Letby's conviction and the ramifications of the trial's outcome on justice for the victims and the accused alike.

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