The judge declined to remove the juror.
Instead, he instructed the entire panel to continue deliberating and to follow the law.
The situation illustrated one of the fundamental tensions within the jury system: a unanimous verdict requires individual jurors to listen to one another, but it also protects an individual juror's ability to disagree with the majority.
The Jury Repeatedly Reported an Impasse
The disagreement did not disappear after the judge's instructions.
The jury eventually sent multiple notes indicating that it remained deadlocked.
By Friday, September 4, the panel had reportedly reached its third indication that it could not reach a unanimous verdict.
Judge Sullivan ultimately declared a mistrial.
The decision came after the jury had spent approximately 38 hours deliberating over seven days.
The jury had been composed of nine women and three men. The final 11-1 division meant that a single juror prevented the panel from reaching the unanimity necessary for a verdict.
The mistrial did not mean Clancy had been found guilty.
It also did not mean she had been acquitted.
Instead, the criminal case remained unresolved.
That distinction is important because a mistrial caused by a hung jury can allow prosecutors to seek a new trial.
Why the Insanity Defense Was So Important
The central question in the trial was not simply whether Clancy had caused the deaths of her children.
Clancy acknowledged responsibility for what happened.
The major legal dispute centered on her mental state at the time.
Her defense argued that she had been suffering from a severe psychiatric episode involving postpartum psychosis. The defense presented evidence intended to show that her perception of reality had become profoundly distorted.
Postpartum psychosis is a rare but serious psychiatric condition that can occur after childbirth. Medical experts have described symptoms that can include hallucinations, delusions, confusion and significant disruption in a person's ability to distinguish reality from false beliefs.
The condition became a major focus of Clancy's trial.
Her attorneys argued that her psychiatric state prevented her from being held criminally responsible.
Prosecutors, however, presented a different interpretation of the evidence.
They argued that Clancy's actions showed planning and awareness and that she remained capable of understanding the consequences and wrongfulness of what she was doing.
The jury therefore had to examine competing interpretations of an extraordinarily complicated mental-health history.
The case required jurors to weigh psychiatric testimony, medical records, statements made before and after the incident, and evidence concerning Clancy's behavior.
It was ultimately that question of criminal responsibility that produced the 11-1 division.
The Holdout Juror's Position
The jurors who have spoken publicly since the mistrial have been sharply critical of the holdout's approach.
Nick Dargie, another juror, said that the holdout did not provide what the other jurors considered sufficient evidence or testimony to support his position.