I thought this was quite interesting. It was discussed here at the time of the trial that it was unusual that Letby's parents would go with her to work when they were first reviewing her potential involvement in the babies deaths.
This news report describes how Letby's dad threatened to "put a gun to the head" of the hospital boss during this meeting. This is quite an extreme response, even if he was trying to defend his daughter.
https://apple.news/AmXQVaiKyQ9at-So9IRFqmQ