I don't know anything about her, but that suicide note also says "I haven't done anything wrong", which indicates at best confusion on her part.
The evidence in her case does seem too circumstantial to convict, a real injustice.
Unfortunately it is impossible to explain to people that a confession is meaningless.
When a Dutch nurse named Lucia de Berk...
In fact, she never confessed. As per her Wikipedia page: Important evidence at the appeal was to be the statement of a detainee in the Pieter Baan Center, a criminal psychological observation unit, where de Berk had said during outdoor exercise, "I released these 13 people from their suffering". However, during the appeal, the man withdrew his statement and stated that he had made it up.Haven't you ever read The Green Mile?