What truly surprises me is that they really created scientifically unverified, but from the legal standpoint, very odd process. They started with accusing Lucy of killing the babies with air embolism or gas in the stomach. That itself wasn't proven, but the prosecution added the case where they accused Lucy of injecting exogenous insulin. I was swayed by that case initially, but I didn't know that Lucy wasn't even working during that day!
No big deal, says doctor Evans, she could have added to TPN bag the day before! And he showed at the trial, how.
Never mind that it could be anyone else, any nurse, any pharmacist, maybe Breary himself, whose way of thinking, in my opinion, reeks of paranoia. In the situation when insulin is kept in refrigerator with the bags, who the heck knows what might have happened? But no, since Lucy has been accused, they add the insulin cases to the whole slew of accusations and show how she could have done it.
Now, of course, it becomes irrelevant since the lab had not passed the certification, and Roche assay has been found unreliable.
But this is Evans's mentality, and the court allows him to get away with it.