If it had not been for the actions of one particular doctor, many more people might have lost their lives at the hands of killer nurse Colin Norris. By November 2002, the Glaswegian, who felt he could "kill with impunity", had already murdered three elderly patients and tried to kill another.

By Tom Wilkinson A HOSPITAL doctor's vigilance prevented a nurse who murdered four elderly patients from continuing his killing spree, a senior police officer said last night.

A NURSE accused of murdering four elderly patients yesterday denied abusing his position of trust to poison five patients.