Assistant DA Ed Kane, who handled the case, admits somewhat lamely that “we knew we had serious problems with the indictment,” and says he wishes he had sought expert medical opinion before proceeding.

Investigations were launched but in neither case did they follow the scrupulous evidence-gathering needed to demonstrate a truly unusual pattern of events. With that knowledge and love for ingredients McTavish moved back to South East Queensland and opened his first business, a delicatessen. Mr Gregg added: "Norris is not only a dangerous criminal but cunning in his actions, choosing times to commit his crimes carefully – being either early in the morning or at weekends when he knew senior and specialist staffs were not routinely on duty.

Finally, freed from work placements but not from his loathing of the elderly, Norris was qualified to work un-monitored, allowing him to administer his deadly injections unnoticed, until it was too late.

Despite the blood test evidence, McTavish claimed during the 15-day trial that she had only injected the patient with a placebo of sterile water. The Ann Arbor Hospital Murders were the murders of 10 patients in an Ann Arbor, Michigan, VA Hospital during the 1970s. He started his apprenticeship as a 15 year old at the iconic Beach Hotel in Byron Bay, and over 20 years later his love of ingredients and cooking is stronger than ever. Initially she was linked to nine incidents in which children either died or required resuscitation, in a single year, and it was claimed that all had occurred during her shifts.

In 1975, 35 patients at the VA Hospital in Ann Arbor, Michigan, suffered respiratory failure, 10 of whom died.