I have no sympathy for a wife beater. Having said that, this isn't exactly a crime of passion. She planned to drug him, carve him up and 'dump' him around the city. By their decision, there was no 'temporary insanity.'
I was merely pointing out the contrast in the article between the 'gore' of her acts and the statement that 'she is of perfectly sane mind.' Although not mutually exclusive, there is a bit of natural conflict in those.