Netflix’s 2026 true-crime documentary film, The Investigation of Lucy Letby, takes an in-depth look into one of the most divisive cases in recent history in the UK. The documentary is centered around the investigation into the mysterious case of dead babies at the Countess of Chester Hospital and the nurse convicted in the case, Lucy Letby. Overall, the documentary makes for an insightful and provocative watch because of the ambiguity that still exists in the case. It is highly recommended to fans of true-crime documentaries, even though the use of AI to present individuals who want to keep their real identities private can be a bit jarring at times.
What was Lucy accused of?
Lucy Letby was born in 1990 to a modest family in Hereford, where she completed her schooling and higher education. Always a polite, sensitive, and hard-working girl, Lucy did not make too many friends, but succeeded in having genuine bonds, like with a girl from the same nursing school that she attended at the University of Chester. The documentary changes the name of this friend to Maisie to keep her real identity private, as she recalls meeting Lucy on the very first day of lectures as the wide-smiled girl walked up to her and introduced herself. It took them just four days of university to become best friends, inseparable from each other, as Lucy and Maisie did everything, from attending lectures to going clubbing, together. Both would sometimes sleep over at each other’s houses, meaning that they were very well acquainted with their families as well. After completing university and graduating as nurses, both Lucy and Maisie were placed at the Countess of Chester Hospital together.
A few years later, in June of 2015, a woman named Sarah (real name changed) was rushed to the Countess of Chester Hospital after her water broke, three weeks before her due date. After being checked, she was told that she had to give birth, and Sarah was excited to finally introduce her beloved daughter, Zoe (real name changed), to the world. But there were complications during labor, as it went on for 60 hours, and Sarah eventually asked for a C-section to be conducted. The baby struggled to breathe after being born, and was immediately placed in an incubator in the intensive care unit. The doctors assured Sarah that her daughter was responding well and would be out of danger soon, but in the early hours of the next morning, baby Zoe suddenly passed away from what seemed like heart failure. One of the consultant pediatricians, Dr. John Gibbs, recalls in the documentary how he and his team were left confused at the death of Zoe, for the baby’s health was really not expected to deteriorate so quickly. But mysteriously, Zoe was the third baby to die at the neonatal intensive care unit at the hospital in just two weeks’ time, which aroused Dr. Gibbs’ suspicions a bit.
But the deaths went on happening after that, much more frequently than usual, and by February of 2016, nine babies had died in intensive care, and most of the consulting doctors had raised alarm bells with the hospital administration. In the case of most of these babies, they had developed some strange-looking rashes on their bodies, and they also did not respond to resuscitation. By June 2016, there had been 13 unexplained deaths of babies at the hospital, and the Cheshire Police were officially informed of the strange situation that had unfolded. A serious medical investigation needed to be carried out to see whether the babies could have passed away from natural causes or whether something sinister had been done to them.
After the initial phases of the investigation, it looked seemingly plausible that someone could have intentionally, or otherwise, caused the deaths of the 13 babies, and so the official records were immediately searched. Only one nurse was found to have been present in the intensive care unit around the deaths of each of these 13 babies, and even more strangely, the mysterious deaths had completely stopped when this nurse had been taken off shift at the unit. This nurse turned out to be Lucy Letby, and while the investigation went on for years, she herself wrote an email to the lead detective in the case, informing him that she was aware of how she was being considered as a suspect, since she had been removed from the intensive care unit and that she was totally willing to cooperate with the authorities to clear her name. Finally, in July of 2018, the Cheshire Police arrested Lucy Letby after gathering enough evidence to name her the prime suspect, and she was brought in for questioning.
What did the police investigation reveal?
The first time that Lucy was arrested from her home, she was interrogated for long hours at the police station and was eventually let go because there was not enough evidence to incriminate her. This was also the case during the second arrest, as there was still not enough evidence to charge her, and it was only after the third arrest that the young woman was charged with 8 counts of murder and 10 counts of attempted murder. Throughout these three interrogations, Lucy came out to be a calm and composed young woman, with quite a strong grasp over neonatal care and the steps required to treat intensive care cases. But there were also quite a number of suspicious matters about her, especially when the police went through her house and found certain documents. A box with the word ‘keep’ was found in her closet, and it contained baby handover sheets from the hospital, which were highly confidential documents. Containing every piece of personal information about the babies who were brought into the intensive care unit, and also detailed reports of their health conditions, the documents were obviously out of place in Lucy’s closet at her home, as they are generally not let out of hospitals.
When asked by the police about it, Lucy stated that she must have mistakenly carried the papers in her pocket while leaving her workplace, but why she would have so many baby handover sheets, 250 to be exact, all neatly kept in a box, remained unanswered. Had she indeed mistakenly brought them home, Lucy could have corrected her mistake by returning them to the hospital in the days and months that followed, but nothing of the sort happened. Even if she had been instructed by someone else to carry them home, or maybe to hide some wrongdoing on the part of the hospital authorities, she did not reveal anything of this sort during the interrogation. Next, a set of personal diaries was found at her home, which contained some suspicious and concerning scribbles made by Lucy, stating in places that she felt guilty and that she was a murderer, and then mentioning in another place that she had gotten away with it and nobody would find out about whatever she was referring to.
Although Lucy did have an answer in this regard, which I’ll come to later in the article, the police were not seemingly convinced by her claim. They focused more on her inability to justify the presence of the baby handover sheets in her room and her false statement about not having a shredder at home, while the police literally found one during their search of the residence. As Lucy’s online activities were looked into, it was found that she had categorically searched for the parents of the deceased babies on Facebook but had not reached out to them. On some of the instances, she had texted a colleague right after the death of a baby, mentioning how the parents and she herself were distraught and heartbroken. While sharing one’s feelings after a death at the intensive care unit is a fairly common practice among nurses and doctors, as they get genuinely affected by the loss, the police found it concerning that Lucy had been looking at the profiles of the parents who had lost their babies at her hospital. It almost seemed like Lucy was stalking the couples for some twisted pleasure and also to look at photos of ‘her victims,’ if there were any. Because of all these small but significant suspicious activities, all put together, the police decided to arrest the young woman, and bring the charges of murder and attempted murder against her.
What happened in the court trial?
Lucy Letby and her defense team did not really have much of a chance during the court trial that followed, and she was termed by the media as the worst baby serial killer in the history of the United Kingdom. She was criticized by the media for not looking affected or guilty during the trial, as she appeared mostly numb and dazed, as if not yet able to grasp what was happening with her. The prosecution laid out its case and tried to prove that Lucy had physically harmed the babies by removing airway tubes to desaturate the oxygen supply given to the babies, and also by overfeeding, inflating the stomach to push the diaphragm towards the lungs and heart in the process. According to the prosecution lawyer, Lucy changed and adapted her modus operandi to fit with the current situation, which really did paint her as a cold-blooded serial killer who sought pleasure from harming babies.
Dr. Dewi Evans, the prosecution’s expert witness and the retired pediatrician who had joined the police investigation quite early into the case, played a significant role during the trial. He informed the judge how he had noticed peculiar skin discoloration and spots on the babies, which, according to his research, pointed to air embolism, meaning that someone must have pushed air into the IV channels of the babies, intentionally causing them to suffer respiratory issues and die. He concluded that Lucy must have intentionally pushed air into the babies’ bloodstream to harm and kill them. Two of the babies were also found to have been injected with insulin, even though they did not need it, and this was what had killed them.
When Lucy was asked whether she agreed to the report of this finding, she did agree to it, which was taken by the authorities as an indirect act of confessing to her crimes. But the few people who supported Lucy at the time, like her best friend, Maisie, felt otherwise, as she now states in the documentary. It would have been illogical and insensitive for Lucy to have denied the insulin report, but her agreeing to it did not mean that she confessed to the crime. Maisie also found it harsh that her friend’s sometimes reactionless appearance during the trial, which could have been caused by her extreme fright as well, was misread by the media as her being a cold and ruthless baby-killer. She also found it strange the defense team did not present any expert witness, as the trial ended up seeming lopsided. Ultimately, the prosecution also proved how Lucy had the keys to the refrigerator at the hospital that contained insulin and other medicines, further suggesting that she had intentionally harmed the babies. As the trial came to a close, Lucy Letby was sentenced to seven terms of life imprisonment, for each of the seven babies she was found guilty of murdering.
Could Lucy have been framed by the administration?
In September of 2024, almost a year after Lucy’s sentencing, a criminal defense barrister, Mark McDonald, officially joined the case after repeatedly proclaiming Lucy’s innocence on TV programs. As part of the convicted nurse’s new defense team, McDonald immediately questioned the flaws in the police investigation and the court trial, starting with the fact that there was absolutely no direct evidence or proof of Lucy having committed the murders. While the medical reports might have claimed some wrongdoing, there was absolutely no record, from security cameras or any other surveillance devices, of Lucy having done anything suspicious. The fact that she was the only nurse to have been present at the intensive care unit when all 13 babies had died, which had been used by the police to prove her involvement, could be easily answered by the suppressed fact that Lucy was one of the most qualified nurses in the hospital, and she was also working extra shifts on a regular basis.
As a passionate and highly skilled nurse, it was obvious that she would be brought into every serious case at the intensive care unit. The seemingly suspicious fact that the mysterious deaths stopped completely as soon as she was completely removed from the unit could be easily answered by the, once again, suppressed fact that the unit itself stopped taking too complicated cases after her removal, and only treated babies with less severe health issues. After she had been removed from the unit, Lucy obviously realized that she was being blamed for the deaths by her colleagues and the consulting doctors, which emotionally broke her, and she was sent to therapy sessions by the hospital itself. In these sessions, Lucy was asked to keep notes of all her feelings, and the scribbles she had done in her personal diaries, which were seen as highly suspicious and concerning by the police, had been made during and after she received therapy. Thus, Lucy had stated during the interrogation that she had only written down the darkest thoughts that troubled her, meaning that they could not have been considered as any form of confession.
Most importantly, McDonald got in touch with Prof. Shoo Lee, the doctor whose theory about air embolism Dr. Dewi Evans had quoted during the trial. In the days that followed, Prof. Lee arranged a team of 14 international medical experts to review all the medical information in the case, and in February of 2025, they held a public press meet in London. During this meeting, Prof. Lee and the others presented their conclusion about the case and stated that there was absolutely no medical proof about the babies having been intentionally harmed or killed. Instead, they believed that the babies, or at least most of them, had died because of infections, which clearly pointed at the administrative failure and incapability of the entire neonatal department, instead of the wrongdoing of any one person. McDonald also pointed out how Dr. Evans had been terribly wrong and even biased towards the prosecution in presenting his expert opinion, while Prof. Lee stated that the doctor had misinterpreted his research on air embolism in the case.
Where is Lucy Letby now?
The defense lawyers have applied for the case to be reviewed, and the procedure is still underway. Back in October of 2023, the UK government launched a public inquiry with the intention of examining the events around the mysterious infant deaths at the Countess of Chester Hospital, along with the court trial of Lucy Letby. Cheshire Constabulary also launched an investigation into potential corporate manslaughter at the hospital around that time. Although the hospital authorities were approached by the documentary producers, they said that it would be inappropriate to talk about an ongoing inquiry and police investigation.
Meanwhile, Lucy Letby was transferred to HMP Low Newton, a female-only closed prison in Durham, after her trial. In July of 2025, the police submitted more evidence to the CPS about possible intentional harm having been done to 9 other babies during the 2015-16 window. But the CPS has ultimately refused to charge Lucy Letby with any further offenses in January of 2026, perhaps suggesting that the trial and the conviction might be under review. According to reports on the internet, Lucy Letby is currently held at the House Block 4 section of His Majesty’s Prison Bronzefield, a female-only prison in Surrey.
