Disclosure Investigates

As families and lawyers reflect on the ruling, Louise uncovers new information, which could challenge one of the central tenets of the case.This series was presented and reported by Louise Shorter Written and produced by Kate Bissell Story consultants were Jack Kibble-White and Kirsty Williams Original music composition by Andy fell It was mixed by Ivan Eastley and Andy Fell Development by Sally Greig Lockwood Series Editors for BBC Scotland - Graham Russell and Susie Crumless Series Editor for Disclosure Investigates - Shelley Jofre The commissioning editors were Victoria Easton-Riley, Heather Kane-Darling and Gareth Hydes.

The defence challenges the science behind Norris’ convictions, but can they persuade the judges?

The view that fatal hypoglycaemia is vanishingly rare in non-diabetic elderly patients comes under question as the science begins to shift.

As Louise looks again at the investigation into Colin Norris, the story of Lucy Rowell helps her understand how the case against him was built.

After one of Britain's most complex medical trials, the newspapers get their headline as Colin Norris is convicted of four murders and one attempted murder.