Reuters reported on September 10 that the defense had formally asked the judge to enter a not-guilty verdict after the mistrial.
The defense argues that the prosecution's evidence did not establish criminal responsibility and that the evidence concerning Clancy's severe mental illness made a conviction unsustainable.
A hearing on the request is scheduled for September 29.
If the judge grants the defense request, the case could end without a second trial.
If the request is denied, prosecutors may seek to try Clancy again.
Prosecutors Face a Major Decision
The mistrial places prosecutors in a difficult position.
A second trial would require another jury to examine the same underlying evidence and determine whether Clancy was criminally responsible.
But prosecutors also know that the first jury was not simply divided evenly.
The reported 11-1 split suggests that the defense's insanity argument persuaded most jurors.
That does not guarantee that a second jury would reach the same conclusion.
A different jury could interpret the psychiatric evidence differently, place greater weight on the prosecution's arguments or reach a different conclusion about Clancy's ability to understand her actions.
Still, the first jury's deliberations provide both sides with important information about how the evidence was received.
The prosecution now knows that a significant majority of the original jurors were persuaded by the defense's argument.
The defense, meanwhile, knows that at least one juror remained firmly opposed to an insanity acquittal.
A retrial would therefore be shaped not only by the original evidence but also by what both sides learned from the first proceeding.
As of the latest reports, prosecutors had not announced whether they would pursue another trial.
The Case Has Also Become a National Conversation About Maternal Mental Health
Beyond the courtroom, the Clancy case has generated intense discussion about postpartum mental illness.
Mental-health professionals have long emphasized that severe psychiatric disorders following childbirth require urgent recognition and treatment.
Postpartum psychosis is considered a psychiatric emergency, although it remains rare.
The condition can involve dramatic changes in perception, behavior and thinking. Because symptoms can emerge quickly, family members and healthcare professionals may face difficult decisions about when someone requires immediate psychiatric intervention.
The Clancy case has brought those issues into public discussion because the defense placed her mental health at the center of the criminal responsibility question.
At the same time, experts and advocates have cautioned against using a single highly publicized case to generalize about postpartum mental illness.
Most people who experience postpartum depression or other postpartum mental-health difficulties do not become violent.
That distinction matters.
The case concerns an exceptionally severe and tragic set of circumstances and should not be treated as representative of parents experiencing common postpartum mental-health conditions.
The Human Cost Remains Central
While the legal debate focuses on insanity, reasonable doubt and jury procedure, the case remains fundamentally about the deaths of three young children.
Cora, Dawson and Callan were at the center of the prosecution's case, while their deaths have profoundly affected their surviving family members.