Senior doctors demanded that CCTV be installed at a hospital unit if Lucy Letby was allowed to return to nursing duties, a court was told.
The nurse's murder trial has heard that senior staff raised concerns over an "accumulating number" of baby deaths. The situation reached a "tipping point" with the deaths of two newborn triplets in June 2016, a consultant told the court.
Dr John Gibbs told jurors that a number of "key safety measures" were introduced after the triplet deaths, including the removal of Letby from the neonatal unit. However a month later he said hospital bosses wanted Letby back on the unit.
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He told the court: "We said that should only happen if CCTV was put in each room in the unit. The CCTV didn't come and neither did staff nurse Letby."
Dr Gibbs, now retired, went on: "In the 11 months before the police got involved, after we raised concerns about the deaths of (Child O and Child P), senior management were extremely reluctant to involve the police to discuss what had happened because we had to keep insisting the police be involved."
Letby is accused of murdering seven babies and attempting to murder 10 others on the neonatal unit between June 2015 and June 2016. She is said to have administered fatal doses of air to both Child O and P on successive day shifts.
Dr Gibbs reviewed Child P's condition shortly after the death of Child O on June 23. He told the court: "'I remember feeling uncomfortable when I arrived on the unit and saw (Child O) and I thought 'Oh no, not another one'.
"I'd become increasingly concerned, and my consultant colleagues shared the concerns, at the accumulating number of unusual, unexpected and inexplicable collapses and deaths happening on the neonatal unit and the fact that staff nurse Letby had been involved in all of them. The deaths of the two triplets was a tipping point for realising something abnormal and wrong was happening on our unit."
Ben Myers KC, defending, said: "The reality is, as we stand here now, you are heavily influenced by a bias against nurse Letby that applies to all of you."
Dr Gibbs replied: "I was most heavily influenced by what was happening to babies on the unit... there was only one common factor." Mr Myers asked: "You didn't contact the police, did you?"
Dr Gibbs said: "That was difficult. Nurse Letby seemed to be involved in all of the cases that involved me. Other consultants were involved with other babies. one of us regrettably realised two babies had been poisoned by insulin, so we didn't have the full picture.
"After the deaths of the triplets - very regrettably too late for them - because the concerns had reached a tipping point, safety measures were introduced and one of the key safety measures which the consultants were insistent on was Lucy Letby be removed from the neonatal unit and that was not a simple, straightforward decision."
Mr Myers said: "You took your time asking for CCTV if your suspicions were so great, Dr Gibbs?" Dr Gibbs replied: "I said increasing concerns were growing over that time. The tipping point was the tragic deaths of the triplets which, looking back, should not have happened in healthy boys."
He said that Dr Stephen Brearey, the senior consultant in charge of the unit had previously flagged concerns to management in 2015 about the association with Letby and collapses of babies. Last week Dr Brearey told the court he urged a hospital executive not to allow Letby to work the day shift after the death of Child P on June 24.
He said that she refused and it is alleged Letby attempted to murder another baby, Child Q, on June 25. Jurors were told Letby submitted a formal grievance to management after she was removed from the unit.
The court has heard the surviving triplet brother was transferred to Liverpool Women's Hospital after his parents "begged" for a move following the deaths of his siblings. Letby, originally from Hereford, denies all the allegations.
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