Experts, including a University of Canterbury professor, claim Lucy Letby did not murder any babies, citing poor care as the cause of deaths.
Dr Shoo Lee criticised the misuse of his work, stating deaths were due to natural causes or bad care.
The Criminal Cases Review Commission received an application to review Letby’s case as a potential miscarriage of justice.
Lucy Letby did not murder a single baby, experts have claimed.
Presenting “significant new medical evidence” in the case of the convicted killer, a panel of experts in the care of newborn babies alleged that they had died as a result of the poor care they had received.
On Tuesday, local time, analysis conducted by a committee of 14 neonatologists was revealed at a press conference in central London.
Letby, 35, from Hereford, is serving 15 whole-life orders for the murder of seven infants and attempted murder of seven others at the Countess of Chester Hospital between June 2015 and June 2016.
But Dr Shoo Lee, a Canadian neonatologist whose work was cited by the prosecution in the original trial, was critical of the care received by the babies and told the hearing that his work had been misinterpreted and misused by the Crown Prosecution Service.
He said the experts had found no evidence of murders, adding: “In all cases, death or injury were due to natural causes or just bad medical care.
“In our opinion, the medical opinion, the medical evidence doesn’t support murder in any of these babies – just natural causes and bad medical care.”
During the hearing, Lee talked through a number of the babies and listed failings in the care provided to them or natural causes. In one case, he said doctors had failed to spot a dangerous bacterial infection in one baby, who later died, saying it was a “preventable death”.
According to the panel of experts, another baby died after getting a blood clot when doctors left lines into the body without an infusion.
In the case of Baby K, in which Letby was convicted of attempted murder of the infant by dislodging her tube, Lee said it was never actually inserted correctly by a doctor.
The convictions were based on blood test readings that showed high insulin levels but low c-peptide levels in the blood - a clear sign that artificial insulin has been administered.
However Professor Geoff Chase, a world expert in insulin, from the University of Canterbury said the prosecution and police were basing their readings on ratios from adults and children.
In fact, he says the ratio of c-peptide to insulin was completely normal for a pre-term infant.
A long list of general findings, which were highly critical of the Countess of Chester Hospital – including work overload, inadequate staffing and poor medical treatment – were presented.
Opening the event, Tory former minister and panel chair Sir David Davis, who has campaigned for a retrial for Letby, described her convictions as “one of the major injustices of modern times”.
It comes as the Criminal Cases Review Commission announced that it had received an application on behalf of Letby for her case to be reviewed as a potential miscarriage of justice.
Speaking after the press conference, Mark McDonald, the barrister leading her legal team, said they would be back in the Court of Appeal “very soon” owing to the “unsafe” conviction.
“There is overwhelming evidence that the conviction is unsafe,” he said. “And if Dr Shoo Lee and the panel are correct, no crime was committed. And if no crime was committed, that means a 34-year-old woman is currently sitting in prison for the rest of her life for a crime that just never happened.”