12:55pm
No other child on the unit was receiving TPN bags that day, in the case of Child F. The turnover of TPN bags was "very low" according to evidence by Yvonne Griffiths.
The bag "was only ever going to one child, isn't it?"
"It's so sly, isn't it?" Mr Johnson says the insulin-contaminated bag was going to be administered when 'the poisoner' was not on duty, to be administered by "an unsuspecting colleague" - "a member of her 'family'".
"What does that tell you about the mindset?"
"It shows you a cynical, cold-blooded" planner, Mr Johnson says.
The amount of insulin in the two bags was 'about the same', which showed there had been thought put into the preparation.
Mr Johnson says Letby "told some interesting lies" about Child F in police interview. "She claimed she hadn't been aware of any concerns about [Child F's] blood sugar."
He says Letby otherwise had a very good memory.
"You know she is lying [from] the text messages she sent to [a nursing colleague]."
Police broke the news of insulin c-peptide to Letby in November 2020, Mr Johnson adds.
The 'surreptitious' searching of Child E&F's mother on Facebook was "never properly explained."
Mr Johnson says Letby was "Cold, calculated, cruel and relentless."
The trial of Lucy Letby, who denies murdering seven babies at the Countess of Chester Hospital neonatal unit and attempting to murder 10 more, is…
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