The medical knowledgeable who helped to show Lucy Letby murdered infants in her care has mentioned he wouldn't be completely satisfied till all 257 instances she stored particulars on have been totally investigated.

Dr Dewi Evans, who mentioned on the nurse’s trial that warnings have been missed, urged police and the Crown Prosecution Service to contemplate notes she stored on a whole lot of infants.

Letby was jailed with an entire life order at Manchester Crown Court final month for the murders of seven infants and tried murders of six on the Countess of Chester Hospital.

Dr Evans, who started investigating the case in 2017, mentioned he was not advised concerning the 257 histories till “after I had finished giving evidence”.

He added: “I thought ‘Oh my God these are trophies’. It’s what serial killers do.

“The defence tried to pooh-pooh this and say, ‘No no, she is just a hoarder’. But the alternative interpretation of that is that she may have tried to put all of those babies in harm’s way. I wouldn’t be happy to close the case, the file, until at least those 257 cases were looked at.”

The prosecution mentioned Letby’s strategies of hurt included injecting air and insulin into blood, pressure feeding an overdose of fluids and inflicting impact-type trauma. Paediatrician Dr Evans, prosecution knowledgeable in instances together with the homicide of tot Finley Boden, thinks Letby modified strategies after a course.

He mentioned: “Letby did not turn up to work one evening and say, ‘I’m going to inject some air into this baby’.

“I was told towards the end of the trial she had been on an intravenous course. She would have been told about the dangers of air getting into the circulation...one week or two weeks prior to the first fatality.”

• Paul Buckland, 35, of Plymouth, who like Letby refused to attend courtroom for sentencing, has been jailed for 20 years at Winchester for intercourse assaults on a toddler. His stance was known as an aggravating consider his sentence.