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A new podcast series has surfaced shortly after a public inquiry into the case of Lucy Letby, a former neonatal nurse convicted for the murder and attempted murder of babies at a hospital in Chester roughly ten years ago. Although the cases differ significantly, supporters of Colin Norris argue that his conviction similarly rests upon contested interpretations of the medical evidence involved.
The events in Norris’ case date back to 2002 when, at 26 years old and originally from Glasgow, he discovered an 86-year-old patient named Ethel in a hypoglycemic coma while she was recovering from a broken hip. Blood tests revealed an abnormally high level of insulin in her system—a finding that led to a murder investigation after Ethel died 21 days later. Suspicion quickly fell on Norris, who was reportedly heard predicting her likely death during the night she fell ill. Authorities then reviewed past deaths on Norris’s wards, uncovering a few additional suspicious cases of severe hypoglycemia or unexplained deaths.
Although definitive blood evidence of insulin poisoning was unavailable in these other cases, prosecutors cited medical chart records that showed persistent, severe low blood sugar levels, which they argued is rare in non-diabetic patients and indicative of foul play. At trial in 2007, defense experts contended four of the five patients had natural causes for their deaths. Following a five-month trial and a hung jury, Norris was convicted by an 11-1 majority and sentenced to a minimum of 30 years without parole. Ethel’s son, Stuart Hall, expressed relief at the verdict, stating, “I don’t think he should come out again. He’s got the knowledge to commit murder but do it discreetly.”
Norris, who now goes by the name Colin Campbell, had lost his first appeal by 2009, when a new scientific study challenged the rarity of hypoglycemia in frail elderly patients—a key premise upheld by the prosecution. This evidence, suggesting that hypoglycemia can occur naturally and more frequently than previously believed, was submitted during a second appeal, which was delayed for 14 years. During this hearing, doctors supporting Norris argued the symptoms observed could occur naturally among elderly patients, whereas Crown experts maintained the hypoglycemic episodes were medically distinct, citing that the low blood sugar levels were refractory, meaning they persisted despite glucose treatment. According to prosecution experts, this medical difference could only be explained by deliberate insulin poisoning.
Questions have persisted about alternative explanations, including the possibility that syringes containing insulin and dextrose might have been accidentally swapped. Initially, investigators dismissed this scenario, assuming staff would notice if a diabetic patient received dextrose instead of insulin. However, endocrinologist Professor Joel Zonszein explained that the effects of overdosing on sugar are quite different from those of insulin, stating, “Insulin is much more aggressive. Giving too much sugar does not cause a coma and it will take more than 24 hours until the person goes into a coma. It’s completely different.” He further noted the blood tests showing high insulin levels in Ethel’s case would still be consistent with accidental exposure.
Further investigation highlighted that all five patients were prescribed various medications, including antibiotics and, in some cases, strong painkillers, which are known to heighten the risk of severe hypoglycemia in vulnerable elderly individuals. There is speculation that Ethel’s coma could have been triggered by such medication, combined with possible accidental insulin administration before the critical blood samples were taken. Despite these possibilities, the Court of Appeal recently rejected Norris’s claims that natural hypoglycemia could explain the patients’ declines, upholding the convictions as sound. Attempts to have the case reviewed by the Supreme Court were also dismissed. Currently, Norris’s legal team has taken the matter to the European Court of Human Rights, though solicitor Rory Hearty warns that this process could take many years to resolve
Read the full article from The BBC here: Read More
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