The clinical context
Baby J was a preterm infant. She survived. The Crown’s case on Baby J alleged an unspecified deliberate act that precipitated a deterioration. Unlike the air-embolism counts or the insulin counts, the Crown did not commit to a specific mechanism on this count — the case was, in effect, that a collapse occurred during Letby’s shift and was inferred to be attributable to her.
The jury’s non-verdict
The jury could not reach a verdict on Baby J. On the criminal standard of proof beyond reasonable doubt, they could not agree that the Crown had proved its case.
Why this is evidentially significant
- Unspecified-mechanism cases are weaker. When the Crown does not commit to a specific mechanism, the case depends entirely on the pattern argument and the shift-rota coincidence. There is no specific physical finding for the jury to weigh. If the jury is not persuaded by the pattern in the abstract, there is nothing else to persuade them.
- Pattern-argument failure mode. Baby J is an instance where the pattern argument failed in practice. Every pattern is only as strong as its weakest link; a pattern that cannot carry every link is not a pattern.
- Natural-pathology sufficiency. The Panel’s reading of Baby J is that her deterioration is consistent with expected natural events on a NICU. Preterm infants have routine deterioration events. An event that cannot be distinguished from routine NICU practice is not a criminal event.
The failed-verdict pattern
Baby J sits alongside Baby H, Baby N and Baby Q as cases on which the original jury did not convict unanimously. See our Baby H deep-dive, Baby N haemophilia analysis, and Baby Q deep-dive. The shared feature across these failed-verdict cases is the availability of a natural-pathology alternative that the Crown could not displace to the jury’s unanimous satisfaction.
The failed-verdict cases are evidentially significant for the CCRC review. On the Crown’s pattern theory, the alleged events on Baby H, J, N and Q were of the same kind as the alleged events on the conviction-carrying babies. The jury’s specific non-conviction on these cases establishes that, at the criminal standard, the same evidential architecture can fail to carry conviction even on the evidence the jury heard at the time. That is relevant context for how a Court of Appeal might evaluate the conviction-carrying cases after CCRC referral.
The Panel’s reading
The Shoo Lee International Expert Panel found no medical evidence of deliberate harm for Baby J. The Panel’s June 2025 Additional 10 Cases Report addressed Baby J explicitly. The conclusion is consistent with the original jury’s inability to convict: the clinical record does not support a deliberate-harm finding to the criminal standard.
What the jury did not hear
- The Panel’s case-by-case finding on Baby J (post-verdict).
- The structural observation that cases without a specified mechanism cannot carry criminal convictions on evidential grounds, independent of jury credulity about the broader pattern.
- The baseline incidence of deterioration events in preterm NICU infants. See the blood-gas and lactate trajectories evidence.