She apparently liked being given charge of the sickest babies on the unit, often asked to be allocated to them. This suggests she likes the drama and importance of critical care, which of flipping COURSE doesn’t prove she murdered them, I’m just pointing out that there is adrenaline and thrill involved in resuscitation/saving lives, not to mention the immense and sincere love and gratitude of the parents/families of patients.
I was an adult ICU nurse and we used to get occasional babies in with epiglottitis, etc., they were so little, and could deteriorate so fast they terrified me, I never volunteered to look after them! But yeah, if an adult arrested, there was a certain kudos to being calm, capable and bringing them back to life. It was all very gratifying, tbh, and I can kind of understand how that might become addictive. There have been a couple of other UK cases where A&E nurses were inducing cardiac arrest in their sick patients, just for the thrill of resuscitating them.