Factual and Procedural Background
This judgment concerns four appeals heard together, involving four carers appealing against their respective convictions related to injuries and deaths of infants in their sole care. The appellants were convicted of manslaughter, murder, manslaughter, and section 20 inflicting grievous bodily harm respectively. The victims were infants aged between 7 weeks and 21 months. Each appellant was the sole carer at the time the victim became seriously ill. The convictions were secured at different Crown Courts between 1995 and 2000, with sentences ranging from 2 years to life imprisonment.
The appeals arise from submissions that subsequent medical research has produced fresh evidence casting doubt on the safety of these convictions. Following the Court’s earlier judgment in R v Cannings, an Interdepartmental Group reviewed similar cases and advised two appellants to seek further consideration, leading to extensions of time and leave to appeal. The fourth appeal was referred by the Criminal Cases Review Commission. Extensive expert medical evidence was heard by agreement of the parties.
Legal Issues Presented
- Whether fresh medical evidence undermines the safety of the convictions based on the accepted medical hypothesis of "shaken baby syndrome" or non-accidental head injury (NAHI).
- Whether the "triad" of intracranial injuries (encephalopathy, subdural haemorrhages, and retinal haemorrhages) remains a reliable diagnostic tool for NAHI.
- The extent to which biomechanical evidence and new medical research affect the assessment of causation and degree of force in these cases.
- The impact of changes in the Crown’s case on the safety of convictions, particularly where the mechanism of injury alleged has evolved post-trial.
Arguments of the Parties
Appellants' Arguments
- Recent medical research challenges the reliability of the traditional "triad" as diagnostic of NAHI, suggesting alternative explanations for the injuries.
- The "unified hypothesis" (Geddes III) proposes that hypoxia and raised intracranial pressure, rather than trauma, could cause the triad of injuries.
- Biomechanical evidence indicates that shaking alone may not produce the injuries observed and that less force or accidental falls could cause severe injury in rare cases.
- There is inconsistency and controversy among experts, and the clinical histories provided by the carers do not fit the prosecution’s case of unlawful force.
- Changes in the Crown’s case and expert opinions post-trial raise doubts about the safety of convictions, particularly where multiple impacts or alternative injury mechanisms are now suggested.
Crown's Arguments
- The triad remains a strong indicator of NAHI, and the fresh evidence does not undermine the safety of the convictions.
- The unified hypothesis (Geddes III) is no longer regarded as credible and cannot replace the established understanding of trauma as the cause of the triad.
- Biomechanical evidence does not disprove that the injuries were caused by shaking and/or impact; the force required is generally above that of rough handling.
- The clinical and circumstantial evidence, including the sole care of the victims by the appellants and the lack of credible alternative explanations, supports the convictions.
- Changes in expert opinions and the Crown’s case do not render convictions unsafe where the totality of evidence supports guilt beyond reasonable doubt.
Table of Precedents Cited
| Precedent |
Rule or Principle Cited For |
Application by the Court |
| R v Cannings [2004] 2 Cr App R 7 |
Guidance on fresh evidence appeals and the evolving understanding of infant death causes. |
Used to frame the context of fresh evidence appeals and caution against dogmatism in medical opinions. |
| R v Kai-Whitewind [2005] EWCA 1092 |
Limits on the use of new medical evidence and the role of the jury in resolving factual disputes. |
Reinforced the principle that the Court of Appeal assesses safety of convictions, not to retry cases. |
| R v Pendleton [2002] 1 Cr App R 441 |
Principles for assessing fresh evidence and whether convictions are unsafe. |
Set out the ultimate responsibility of the Court of Appeal to decide if a conviction is unsafe in light of fresh evidence. |
| Dial and another v State of Trinidad and Tobago [2005] 1 WLR 1660 |
Reaffirmed the principles in Pendleton regarding evaluation of fresh evidence. |
Supported the approach of assessing fresh evidence in the context of the whole case. |
| R v Hakala [2002] EWCA Crim 730 |
Emphasized the essential question of safety of conviction when fresh evidence arises. |
Applied in confirming the test for safety of conviction. |
| R v Hanratty (Dec'd) [2002] 2 Cr App R 30 |
Consideration of changes in Crown case and the effect on safety of conviction. |
Applied to reject arguments that changes in Crown case necessarily render convictions unsafe. |
| R v Stacey [2001] EWCA Crim 2031 |
Distinction between murder and manslaughter based on intention and degree of force. |
Guided the substitution of murder conviction for manslaughter where intent was not safely established. |
| R v Bonython [1984] 38 SASR 45 |
Rules on admissibility of expert evidence. |
Referenced in discussion of expert evidence admissibility. |
| R v Clarke (RL) [1995] 2 Cr App R 425 |
Admissibility and evolving nature of scientific expert evidence. |
Used to support admission of evolving scientific evidence even if at hypothesis stage. |
| Re AB (Child Abuse: Expert Witnesses) [1995] 1 FLR 181 |
Guidance on expert witnesses in child abuse cases and management of medical disagreement. |
Reiterated the duty of experts to clarify hypotheses and areas of controversy. |
Court's Reasoning and Analysis
The Court carefully examined the fresh medical evidence presented by experts on both sides, focusing on the reliability of the triad of injuries as diagnostic of non-accidental head injury (NAHI) and the competing unified hypothesis (Geddes III) proposing alternative causes. The Court found that Geddes III had been effectively discredited and could no longer be regarded as a credible alternative explanation for the triad.
However, the Court recognized that the triad remains a hypothesis rather than an infallible diagnostic tool. It emphasized that the triad alone does not automatically establish NAHI and that all clinical and circumstantial evidence must be considered.
The Court analyzed biomechanical evidence, noting divergent expert opinions about the force necessary to cause the injuries, the possibility of rare cases where minimal force may cause severe injury, and the limited ability to correlate force and injury severity scientifically. The Court highlighted the importance of clinical history and cautioned against disregarding carers' accounts without compelling medical evidence.
In each individual appeal, the Court assessed the totality of evidence, including expert medical testimony, clinical history, and circumstantial factors. It acknowledged significant shifts in the Crown’s case in some appeals, particularly where the mechanism of injury evolved from pure shaking to multiple impacts or other injury mechanisms.
The Court applied the established legal test for fresh evidence appeals, focusing on whether the new evidence might reasonably have affected the jury’s verdict and whether the convictions remain safe. It noted that where there are genuine medical disagreements, the Court of Appeal is not the forum to resolve them definitively but must assess safety of conviction.
Holding and Implications
Harris: The Court found the conviction unsafe due to significant medical disagreements and clinical history pointing away from non-accidental injury. The appeal was allowed and the conviction quashed.
Rock: The conviction for murder was not safe given the evidence and surrounding circumstances; however, the conviction for manslaughter was safe. The Court substituted the murder conviction with manslaughter and allowed the appeal to that extent.
Cherry: The Court was satisfied that the conviction for manslaughter was safe, rejecting the possibility of accidental fall as an explanation. The appeal was dismissed.
Faulder: The Court found the conviction unsafe due to a radical change in the Crown’s case, the presence of multiple unexplained injuries, and credible alternative explanations consistent with the appellant’s account. The appeal was allowed and the conviction quashed.
The Court emphasized that these cases demonstrate the fact-specific nature of NAHI allegations and the importance of careful management of expert evidence. It refrained from issuing new guidance but reiterated established principles governing expert witness duties and case management. The Court acknowledged the complexity of medical evidence in such appeals and expressed gratitude to counsel and experts for their contributions.