Those babies didn't die. Those were not murder accusations but attempted murder.
To clarify. Lucy Letby was accused of deliberately administering a high dose of insulin to two babies, in an attempt to murder them.
Those two babies were "Child F", and "Child L" for both of which she was charged , and convicted of attempted murder.
My source for this information is this article in "Nursing Times":
https://www.nursingtimes.net/news/children/breaking-lucy-let...