This is the loophole that both side tried to exploit during both the initial trial and the re-trial.

No one questions the claim that Yates was mentally ill, either before or during the events that took place. However, in the trial, the decision and weight of prosecution's case lied in the ideal that she had some semblance of knowledge that what she was about to do was wrong. Her mental illness undoubtedly had an effect on how she perceived her actions. She felt that ending her children's lives early would save them from eternal damnation (Dix, 2005).

Two key facts led to the decision in the first trial that she "knew" what she was doing, and that it was "wrong." The first is that she took precautions against being interrupted until she had completed the task. She locked the family dog in the cage when the dog raised protests to...
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