Skip to content

April 2026: Thirlwall Inquiry final report due after Easter · CCRC still reviewing 31+ independent expert reports · Shoo Lee Panel (Feb 2025): no medical evidence of deliberate harm.

Lucy Letby Facts

Biography

Prof. Geoff Chase

Distinguished Professor at the University of Canterbury, New Zealand. International authority on physiological modelling of insulin and glucose regulation. His published work is cited throughout the independent-expert critique of the Letby insulin evidence.

Physiological modelling
New Zealand
Last updated
4 min read

Why he matters in this case

Prof. Chase approaches the insulin-evidence problem differently from Dr Adel Ismail. Where Dr Ismail addresses the laboratory assay itself, Prof. Chase addresses the physiology. His published modelling work — developed over two decades of clinical collaboration in neonatal and adult intensive care — asks a direct question: given the Crown’s theory of what was done (insulin added to a TPN bag), and given the baby’s observed glucose and C-peptide pattern, are the reported insulin values physiologically plausible?

His answer: no. The reported insulin values (4,657 pmol/L in one case) are in the range seen in adult attempted-suicide patients who have injected hundreds of units of insulin. They cannot reasonably be produced by the mechanism the Crown proposed.

Professional background

  • Distinguished Professor, Department of Mechanical Engineering, University of Canterbury, NZ.
  • Co-developer of the STAR / SPRINT glucose-control protocols used clinically in intensive-care units in multiple countries.
  • Published widely in peer-reviewed journals on insulin sensitivity modelling, glucose variability, and the analytical limits of clinical-laboratory insulin measurement.

Read alongside