Lucy Letby’s diaries are found during a police search of her addresses. They purport to contain a chilling code used by Letby to denote the days on which she attacked babies. However, it turns out that the letters that the police thought were “LO” are in fact “LD” which is a common acronym used by nurses that stands for “Long Day”. Post-it notes were also found on which Letby had scribbled “I am evil” and “I killed them on purpose”. Was Letby confessing to crimes or did her notes have another explanation?