Something it's always worth noting with confessions, is that by themselves they're not great evidence as has been shown by numerous unsafe convictions, people can and do blame themselves for things that happen outside of their control and question if they were good enough or if they made some mistake that resulted in a death (even when there is a full investigation that shows they did everything right).
You tend to see it a lot after accidents, or where say a child has died and the parent/caregiver is questioning themselves, and there have been a large number of (mainly) young women who have ended up in jail after a "confession" that was basically misplaced guilt, and going back quite a few murder cases where it turned out the confession was obtained under very unreliable circumstance (hence you don't rely on it alone)..
I don't know what to think of this one, but I can quite see how someone might be innocent but feel incredibly guilty and end up blaming themselves if they had a number of children die in their care, even if they did nothing wrong, and there is a part of me that does wonder if perhaps there is some element of a hospital failing to have adequate care resulting in excess deaths and blaming someone for it.
