Family members of a woman killed in a Leeds hospital are voicing doubts about the conviction of former nurse Colin Norris, now suggesting his crimes may have been a series of medical accidents rather than deliberate murders. Norris has been imprisoned for 18 years after being convicted in 2008 of killing four elderly patients and attempting to murder a fifth.
The concerns were highlighted in a new BBC podcast, Disclosure Investigates: Killer on the Ward, which re-examined medical records, police interviews, and scientific evidence surrounding the case of Ethel Hall. Hall, then 86, died in 2002 while recovering from a broken hip. Initially, her family believed Norris had injected her with lethal insulin, but her daughter-in-law, Helen Hall, admitted the evidence “is just not sitting right” after reviewing new findings.
During the 2007 trial, prosecution experts argued that severe hypoglycemia in non-diabetic, elderly patients was extremely rare and indicated deliberate insulin poisoning. They cited four other deaths where charts showed persistent low blood sugar, despite no blood tests being taken at the time. The defense countered that these were natural causes, but the jury convicted Norris by an 11-1 majority, handing down a whole-life tariff with a minimum of 30 years before parole eligibility.
One significant development involves the possibility of an accidental drug swap. Doctors who treated Ethel Hall initially suspected she had been given insulin intended for another patient. Although this theory was dismissed during the investigation because no one in adjacent beds was scheduled for insulin, the BBC investigation identified a diabetic patient on another part of the ward receiving insulin around the same time.
Medical notes indicate that shortly after Ethel’s glucose injection was prepared by Norris, another nurse asked him to check a syringe dosage in the same treatment room. Endocrinologist Professor Joel Zonszein stated that if dextrose had been accidentally administered to the diabetic patient instead of insulin, it would not have caused severe illness, whereas accidental insulin administration to Ethel would explain the coma and high insulin levels detected five hours later.
Furthermore, new scientific evidence challenges the assumption that hypoglycemia is vanishingly rare in frail elderly individuals. All five patients in question had been prescribed medications, including antibiotics and powerful painkillers, which are known to increase the risk of severe hypoglycemia. It remains possible that a strong opioid prescribed to Ethel for post-operative pain caused her initial collapse, with the fatal insulin dose being an accidental mix-up.
The Court of Appeal rejected Norris’s latest appeal last year, with judges expressing no doubt about the safety of the convictions. However, his legal team has applied to the European Court of Human Rights, a process expected to take several years. Meanwhile, Ethel Hall’s son Stuart Hall maintains that Norris should never be released, while Helen Hall insists that closure will only come when the truth is definitively established, whether through proof of guilt or innocence.
An 11-1 verdict suggests the jury had serious doubts initially. Reopening this case was long overdue for the families seeking truth.
The accidental swap theory makes terrifying sense. Old people on antibiotics absolutely can have low blood sugar without foul play involved.