Jury nears crucial decision in Lindsay Clancy murder trial.

Psychologist Paul Zeizel testified Wednesday that Lindsay Clancy had no appreciation for the wrongfulness of killing her three children and could not conform her behavior to the law.

• Zeizel logged more than 35 hours with Clancy across dozens of visits since February 2023.
• Postpartum psychosis afflicts 1 to 2 per 1,000 women after delivery, researchers estimate.
• Clancy, 36, strangled Cora, 5, Dawson, 3, and Callan, 8 months, then jumped from a second-story window.
• A guilty verdict carries life without parole; acquittal on criminal responsibility means a mental health facility.

Why it matters: The central legal question is whether Clancy's mental state at the time of the killings removes criminal responsibility under Massachusetts law.

• Zeizel said psychosis does not prevent routine tasks like driving, a key issue given Clancy's activities the day of the killings.
• Clancy's medical records show she visited a perinatal clinic in December 2022 fearing her "brain was damaged" and that she would lose her children.

How 34 sources split on this story

Where they split: The dispute is whether Zeizel's diagnosis is clinically valid and whether his dual role as treating clinician and defense expert compromised his objectivity.

What’s next: Defense witnesses continue; prosecutors have challenged Zeizel's impartiality and factual accuracy in his written report.

• Prosecution pointed out that no medical records document Clancy reporting voices telling her to kill herself.
• Will the jury find Zeizel's testimony credible given prosecutors' challenges to his objectivity and the gaps in the medical record?
• What will the prosecution's own expert witnesses argue about Clancy's mental state at the time of the killings?