Gaaaawd, Please don't all jump at me
I wasn't for one second suggesting her defence should have set her free or imply that she was at no fault, but they could've got a lot more experts to testify for her - for example around her mental state around the time. Many people claim "insanity" or stress or anything else to justify their actions. I also always see many times, odd weird doctors to testify for baseless cases. I am surprised they couldn't even get one single nurse or doctor, even a non-respectable one.
And given all the support she had, more "friends" to testify what a "great person" she is to support her character.
I am not saying this would have helped her, just that it would have been a more balanced defence.
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They proved it wasn't hyperinsulinism anyway and that it was man-made insulin that was used.