A defense psychologist, Paul Zeizel, testified at the murder trial of Lindsay Clancy in Plymouth, Massachusetts. He contended that Clancy was unable to appreciate the ‘wrongfulness’ of the murders of her three children due to her mental health issues.
According to Zeizel, Clancy, who has been diagnosed with bipolar disorder, also suffered from postpartum psychosis, a rare mental health condition following childbirth. He stated she was unable to conform to the behavior laws require and had no understanding of her actions’ wrongfulness.
“She had a mental disease or defect,” Zeizel told the court.
This testimony is central to the defense’s case that Clancy, who tried to kill herself after the murders, should not be held legally responsible.
Note: This article discusses suicide. The U.S. crisis lifeline is available at 988 for support.
Clancy, aged 36, has pleaded not guilty to murder charges for the deaths of her children, Callan, Dawson, and Cora Clancy, aged between 8 months and 5 years. Postpartum psychosis, linked with the stresses of childbirth, is estimated to affect 1 to 2 per 1,000 women. It is more severe than postpartum depression.
The prosecution argues that Clancy planned the killings in January 2023. They say she sent her husband out deliberately to get medicine and dinner, allowing her to act.
Zeizel said Clancy sought help at a perinatal clinic in December 2022, reporting feelings that her brain was ‘damaged,’ and she had thoughts of self-harm. He stated she was paranoid and feared losing her children.
He noted that while Clancy performed daily tasks like driving and searching the internet on the day of the killings, these did not negate her psychotic state.
“Does doing everyday tasks mean she is not in a psychotic state? It does not,” Zeizel responded when questioned by Clancy’s attorney.
Prosecutors questioned Zeizel’s report accuracy and objectivity, noting errors and his work with the defense. They pointed out Clancy only reported a desire to die, not hearing voices instructing her.
Clancy remains paralyzed from the waist down following her suicide attempt, where she jumped from a second-story window. Prosecutors challenged the attempt’s seriousness.
Prosecutor Shanan Buckingham cited hospital reports, noting the absence of any actions by Clancy to commemorate her children’s birthdays or the anniversary of their deaths. They suggested that Clancy was not as overtly affected emotionally by her actions as the defense implies.
Zeizel, however, described Clancy as having ‘bad days and worse days.’ He asserted that she frequently speaks about her children, expressing love and longing.
If convicted, Clancy faces life imprisonment without parole. A not guilty verdict due to lack of criminal responsibility would result in commitment to a mental health facility.

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