What if any differences exist between (potentially Lucy Letby if found guilty) Beverly Allitt and Harrold Shipman? I think the latter attempted to gain finacially by altering wills? There's also the case in Glasgow involving a male nurse. He was found guilty but is appealing. Afaik this is the extent of medical personnel deliberately harming patients in modern times? There have been cases of care workers abusing patients.
For Harold Shipman elderly patients were a nuisance. He once stated to a colleague he was going to erect a plaque in the surgery: "
This seat reserved for Ivy Lomas." He realized rumours were circulating in Hyde about his monicker of
Dr. Death and vowed to kill one last patient, whereupon he forged the will of Kathleen Grundy, and was caught.
I don't know about Beverly Allitt and (allegedly) Lucy Letby. They must both have had feelings of inadequacy, possibly jealous of parents who had a stable family life. Colin Norris, to whom you allude, craved excitement in what for him was a dull job, though I believe there is a new appeal. Benjamin Geen was another thrill-seeker. The master of all this was Arnfinn Nesset, on whom I wrote a piece on Betnod, which has subsequently been destroyed.