Because plea deals always get murderers off death sentences. That’s why.
Nevada hasn't got a good track record of either obtaining, or carrying out death sentences on female killers, at any rate. So, it was extremely unlikely that this *individual* would have received a death sentence which would be executed at all, let alone in a timely fashion, plea deal or not.
While I can understand the outrage, one must look reality square in the eye. US jurisprudence has had a rather lengthy period of squeamishness when it comes to "taking out the trash", if said "trash" is female.
the infowarrior