McCoy: This defense didn't work with Andrea Yates in Texas, and she drowned five children.
Andrea Yates is the mother who killed her five children and was convicted despite the defense's claim that she was suffering from postpartum psychosis. Interestingly enough, one of the reasons that the conviction was overturned was because a prosecution witness, Dr. Park Dietz, had suggested that Yates' defense was based on a Law & Order episode about a mother who drowned her children and got away with it. No such episode had aired prior to the murders being committed. As of September 2006, Yates had been granted a new trial, in which the jury found her not guilty by reason of insanity.