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.