"To stop my son going into a hypoglycaemic coma, he uses Lucozade to bring his blood glucose levels up," she says.

In the other four cases, the evidence against Norris was circumstantial, resting on him having been on duty when the elderly women became hypoglycaemic.

Unable to reliably anticipate what he needed, Wiley was having severe hypoglycaemic episodes and was at risk of diabetic seizures and long-term disability.