He continued: “The most likely cause is one of two things: either mismanagement of the hospital, as the Royal College concluded, or a superbug, as the investigation found, or both, which is much more likely. I don’t want to find her innocent, I want a retrial, do it right.”
Davis, a civil liberties activist, became interested in the case after he expressed concerns that a long article about Letby in the New Yorker magazine had been blocked in the UK.
Since then, he has spent months reading trial transcripts and studying the scientific evidence presented by the prosecution.
He said he would raise the issue in parliament and seek to refer the matter to the Criminal Cases Review Commission.
However, the victims’ families have criticized the continuing speculation about Letby’s innocence, describing it as adding to their grief and distress.
At the start of a public inquiry into the scandal, which began in September, the chairwoman, Justice Thirlwall, suggested that doubts about the nurse’s guilt came “entirely from people who were not present at the trial”.
She said: “All this noise has caused enormous additional stress for parents who have suffered too much. It is not up to me to review convictions. The appellate court did so with very clear effect. The beliefs remain.”
