Cases of Sudden Babies Death

With the passing of the Mandatory Reporting of Child Abuse Ordinance (Cap 650), it is fitting to look back at a piece of horrific legal history where young siblings were made to endure unspeakable abuse, and the death of the younger sister, which led to this development in Hong Kong, and how the death of children remained a controversial issue abroad.

In recent years, a number of homicide cases in Hong Kong and abroad have caused great concern as they involved the death of infants or children. While there can be no doubt that such child abuse cases are among some of the most heinous and tragic crimes, care must be taken when dealing with objective medical evidence so that the jury is not overwhelmed by the highly sensational facts in these cases.

Hong Kong – The case of Lam Lam

In 2018, the murder of a 5 years old girl “Lam Lam” and the abuse of his 8 years old brother shocked Hong Kong. It was even described as the worst child abuse case of Hong Kong. The brother and sister were living with their parents – their birth father and a step mother, and step grandmother. They also lived with another child from the step mother’s previous marriage.

It transpired that Lam Lam’s nursery school teacher noticed that she was asking for more food and had various injuries all over her body over some months. However, the parents asked for leave and suspension from school. They soon withdrew Lam Lam from the nursery. At the same time, the brother’s primary school teacher noticed that he was always tired and showed multiple injuries on his body. Teachers also noticed he was hungry at school and gave him food. He was soon absent from school as well.

Throughout this period, the brother and sister received harsh treatment and physical abuse that are ineffable.

On 6 January 2018, at 13:15, the father called 999 for assistance to their Turn Mun flat. Soon after, ambulancemen found Lam Lam unconscious in the living room without a pulse. At the time, she was wearing a diaper, her face was swollen, her calves were bruised and the injured parts of her body had not been dressed. She was taken to the emergency room of Tuen Mun Hospital, and was certified dead at 14:38 after attempts of resuscitation.

The parents were charged for the murder of Lam Lam and the step grandma was charged for child abuse. The parents’ pleas for manslaughter were not accepted by the prosecution. Thus the three went to trial before a jury in the High Court.

While the case seemed overwhelming, the burden remained on the prosecution that the parents murdered Lam Lam but not excusable as manslaughter. Thus not only must they prove that the parents caused Lam Lam’s death, but they also intended to cause her death or very serious bodily harm.

In order to do that, medical evidence played a vital role. In this case, multiple medical experts gave evidence to shed light on Lam Lam’s physical and psychological conditions. These include a forensic pathologist, a paediatric immunologist, and a microbiologist. While Lam Lam suffered multiple physical injuries, none of which were fatal. The cause of death was septicaemia – a bacterial infection that entered her blood.

However, evidence on the injuries revealed Lam Lam suffered multiple blunt trauma injuries that failed to heal over an extended period and became infected. The extent of such injuries would seriously affect Lam Lam physically, which would be obvious to anyone that she needed medical attention.

The thymus of Lam Lam has also severely shrunk. This is a result of infection, malnutrition and prolonged physical or emotional stress. The shrunken thymus also weakened Lam Lam’s immune system, rendering her much more prone to infection, linking her physical condition to her cause of death at the same time, shedding light on how she was treated by her parents.

On appeal in HKSAR v CHP [2023] 2 HKLRD 53, the proper standard on causation was challenged. However, the Court of Appeal affirmed the standard direction given, that the prosecution must prove that the defendants’ conduct was “significant” and “more than trivial”.

In dismissing the appeal, the Court of Appeal remarked that:

‘This was a wicked and disturbing case, which will have shocked everyone in the community. As the judge remarked, in his careful review of the evidence, it was “a case of extreme cruelty to the two children over a period of about five months”, which was, in respect at least of Z, “one of the worst cases of its kind” to come before the courts. Any parent who visits upon his or her own children (or, indeed, step-children) the sort of physical and emotional cruelty and abuse described in this case, which has led to the death of one child and the severe and probably life-long emotional scarring of the other, when those children were powerless to defend themselves against the torments of those who were supposed to cherish and protect them, deserves no mercy whatsoever.’

It is troubling that despite Lam Lam and her brother showing physical signs of abuse and frequently skipping classes, the kindergarten and teachers had failed to report the case. This sparked a wave of policy and legal reforms on the identification and reporting of abuse, culminating in the Mandatory Reporting of Child Abuse Ordinance (Cap 650) coming into force on 20 January 2026.

United Kingdom – The Case of Lucy Letby

The issue of the sudden death of children and child abuse is a highly alarming and controversial issue, not just in Hong Kong. Two incidents in the United Kingdom may shed light on this.

In August 2023, Lucy Letby, a former neonatal nurse at the Countess of Chester Hospital in the United Kingdom, was convicted of murdering seven infants and attempting to murder another seven between June 2015 and 2016. Her conviction made her one of the most infamous child killers in modern British history, causing shockwaves across the nation and prompting intense scrutiny of hospital protocols and the healthcare system as a whole. 

However, the aftermath of the conviction has been fraught with controversy. Mainly concerning the medical evidence of the deaths. Plainly, the cause of death and the medical mechanism are important factors in distinguishing death from one’s own disease or an intentional killing.

Of the seven deaths, the alleged causes are from air embolism. This has since been challenged and remains controversial.

An international panel of 14 experienced clinicians, including Dr Shoo Lee, a retired neonatologist, reviewed Letby’s cases and found no evidence of malfeasance. Reports of their findings were published. Although systemic issues within the National Health Service (NHS) and problems at the level of individual teams were identified, there was no evidence to suggest Letby’s wrongdoing. Instead, the panel concluded that highly plausible natural causes for the infants’ deaths or deteriorations were either unrecognised or managed suboptimally. Medical records and witness statements presented during the trial were considered concerning, with experts questioning the validity of Letby’s convictions based on disputed medical and statistical evidence, technical flaws, and a lack of a clear motive. This starkly contrasts with the trial’s conclusions, raising concerns about a potential miscarriage of justice.

Dr Dewi Evans, a retired and experienced paediatrician, played a pivotal role in the prosecution’s case against Letby. The case placed heavy weight on Dr Evans’ opinion. However, from the international panel’s perspective, his conclusions were selective and inconsistent with the full range of evidence. Other experts were asked to review his conclusions, but not all were tasked with thoroughly examining the specifics of the cases.

This situation has sparked broader debates about the reliability and appropriateness of expert witnesses in criminal trials. Evaluating a medical practitioner’s expertise requires specialised knowledge, which neither the police nor legal teams are always prepared to assess. The differences between expert opinions highlight the difficulties courts encounter when interpreting complex medical evidence. 

If not careful, the jury might be misled by incomplete and misleading information. This could ultimately lead to a flawed verdict based on incorrect medical and scientific information. The case raises important questions about the effectiveness of current legal frameworks in addressing complex medical issues and about how expert witnesses should be scrutinised and questioned.

Additionally, systemic issues within the NHS, particularly regarding the management of high-risk pregnancies and the capacity of The Countess of Chester Hospital’s neonatal unit to handle complex cases, may have contributed to the observed outcomes. The Countess of Chester Hospital’s neonatal unit was not equipped to care for the most seriously ill babies, which may have contributed to the adverse outcomes. This situation also calls for better protocols and guidelines to ensure that appropriate care is provided in adequately equipped facilities.

The case of Lucy Letby is still ongoing as of today (21 February 2026), with death inquests of some of the babies pending to be held this year. The Thirlwall inquiry was established on 19 October 2023 to review the incident. The final report, which would include recommendations, is scheduled for after Easter 2026.

This is not the first time that the sudden, unexplained death of children has led to controversies. 

United Kingdom – Prof Roy Meadow

Professor Sir Roy Meadow was a prominent British paediatrician and a leading expert on child abuse. His reputation was severely damaged due to his role as a prosecution expert witness in several wrongful trials concerning child death, by presenting himself as an expert in statistics, which is outside of his field of expertise.

The most infamous case is the prosecution of Sally Clark. Where her two sons died of sudden infant death syndrome (SIDS) – an unexplained death the occured in babies below one, which is a rare event. Meadow testified that the odds of two SIDS happening naturally were 73,000,000:1, by squaring the probability of 8,500:1 for SIDS in affluent non-smoking families. He also argued that two SIDS will happen once every hundred years. In November 1999, Sally Clark was convicted of murdering his two sons.

The Royal Statistical Society later pointed out that Meadow’s statistical approach was fundamentally flawed, and “the calculation leading to 1 in 73 million is false”. In essence, he treated two SIDS in the same family as independent events. However, there are strong reasons to suggest that SIDS is related to genetics and environmental factors. Hence not independent at all.

Sadly, for Sally Clark, a solicitor, it has been a devastating ordeal. Her conviction was overturned after serving three years in prison. However, she developed severe psychiatric problems and died from alcohol poisoning in March 2007.

The case of Sally Clark prompted the Attorney General Lord Goldsmith to review hundreds of cases concerning murder by parents or carers. Cases have been identified and reopened as a result.

These cases collectively remind us that child death cases are extremely sensitive, often provoking intense public emotion, yet the courts must steadfastly adhere to the principle of relying on objective medical and scientific evidence. Only when the evidence is complete, and all other reasonable possibilities have been excluded, can a guilty verdict be returned. This principle both safeguards the right to a fair trial and ensures that the truly guilty are appropriately punished while the innocent are not wrongly convicted.

The case of Lam Lam, Lucy Letby, and Sally Clark highlights the complex interface between medicine and law, especially when complex medical evidence is relied upon in child homicide cases. While these cases are heinous, misinterpreted evidence could result in a grave miscarriage of justice. Striking a delicate balance between child protection, punishing for crimes and ensuring a fair trial remained a major challenge in the modern criminal justice system.