Agreed, but the email cited in the OP's link (in the opening post) is allegedly 'emerged on Sunday night'.
The revelatory email, which emerged on Saturday, appears to cast doubt over events surrounding the nurse's actions in the lead up to one baby's death.
Dr Ravi Jayaram - the only medical witness to give evidence across both of Letby's trials - testified that the nurse was seen standing over Baby K's cot as the infant's condition deteriorated.
Taking the stand, the doctor said Letby failed to call for help as the newborn's condition continued to deteriorate, insisting the nurse had virtually been caught 'red handed'.
The new email, sent on May 4, 2017, to colleagues at the Countess of Chester Hospital, appears to cast significant doubts over that order of events.
...
Prior to the start of the police investigation, Dr Jayaram wrote: "At time of deterioration ... Staff nurse Letby at incubator and called Dr Jayaram to inform of low saturations."
The revelatory memo appears to contradict previous testimony, with the evidence not making it into documents handed to police prior to the start of the investigation.
This is of significant interest to all parties.