A panel of international medical experts has disputed key prosecution evidence against Lucy Letby.
At her trial in 2023, prosecutors pointed to skin discolouration in several of the victims as evidence that air had been injected into their veins by Letby.
Retired neonatologist Dr Shoo Lee, who co-authored an academic paper on air embolisms (bubbles) in babies in 1989, said he believed his findings on skin mottling were misinterpreted by the prosecution.
Presenting the findings of a panel of 14 experts at a news conference, he said in a new paper he published in December 2024 there were no cases of skin discolouration when air was injected into the veins.
“The notion that these cases are air embolism because they collapsed and because there were skin rashes has no basis in evidence. Let’s be clear about that,” Dr Lee said.
Lucy Letby latest: Experts reveal ‘new medical evidence’ questioning nurse’s guilt
The panel laid out alternative natural causes of death in many of the cases.
In one case he claimed mistakes were made in the baby’s care, saying the “consultant did not understand the basics of resuscitation”.
Minutes before the conference began, the Criminal Cases Review Commission, which investigates potential miscarriages of justice, announced it would review Letby’s case after receiving an application from her lawyers on Monday.
Opening the press conference, MP Sir David Davis described Letby’s convictions as “one of the major injustices of modern times”.
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Letby, 35, the UK’s most prolific child killer of modern times, is serving fifteen whole life terms in prison after she was convicted at Manchester Crown Court of murdering seven infants and attempting to murder seven others between June 2015 and June 2016.
Various methods were used to attack the babies while the defendant worked as a nurse on the neonatal unit at the Countess of Chester Hospital.
One method was air being injected into the bloodstream which caused an air embolism, blocking the bloody supply and leading to sudden and unexpected collapses.
Last year Letby lost two bids to challenge her convictions at the Court of Appeal – in May for seven murders and seven attempted murders, and in October for the attempted murder of a baby girl, which she was convicted of by a different jury at a retrial.
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In December, the former nurse’s barrister, Mark McDonald, said he would seek permission from the Court of Appeal to re-open her case on the grounds Dr Dewi Evans, the lead prosecution medical expert at her trial, was “not reliable”.
Dr Evans, a retired consultant paediatrician, said concerns regarding his evidence were “unsubstantiated, unfounded, inaccurate”.
In September a public inquiry into how Letby was able to commit her crimes began hearing evidence. Closing legal submissions are expected in March and the findings are expected to be published this autumn.
Detectives from Cheshire Constabulary are also continuing their review of the care of some 4,000 babies admitted to the Countess of Chester Hospital from January 2012 to the end of June 2016, while Letby worked as a neonatal nurse, there. It also includes two work placements at Liverpool Women’s Hospital in 2012 and 2015.
Letby has been interviewed under caution at HMP Bronzefield in Ashford, Surrey, in relation to the ongoing investigation into baby deaths and non-fatal collapses.
She maintains her innocence.
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