Lucy Letby: Why Experts Are Challenging the Conviction (IV)

The prosecution's medical evidence was the backbone of the case against Lucy Letby. It is now the foundation that experts around the world are trying to dismantle.

Dr. Shoo Lee co-authored a 1989 paper on air embolisms that was cited as key evidence at trial. He was never asked to testify. When he reviewed how his work had been used, he said it was misinterpreted. He assembled fourteen international medical experts who examined every clinical file. Their finding: the skin discoloration the prosecution cited as evidence of air embolism was actually consistent with hypoxia, a common and natural complication of prematurity. No evidence of murder in any of the seventeen cases.

The Royal Statistical Society criticized the staffing chart for excluding incidents where Letby was absent. A police consultant statistician was told by prosecutors to stop her work before it was finished. The handwritten notes the prosecution presented as confessions were reportedly written on a counselor's advice as a stress-management exercise. The door-swipe data was mislabeled.

The CPS declined additional charges in January 2026. In February 2026, thirty-one expert reports from twenty-six international specialists were submitted to the Criminal Cases Review Commission. Letby's defense argues the original case should be urgently reconsidered.

Part four of five. The doubt is not theoretical. It is scientific, specific, and backed by credentialed professionals. Part five examines where it all stands and what happens next.

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This publication contains commentary and opinion based on publicly available information. All individuals are presumed innocent until proven guilty in a court of law. Nothing published here should be taken as a statement of fact, health or legal advice.

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