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Former mother-in-law testifies in Lindsay Clancy murder trial

Susan Clancy testified that Lindsay Clancy was struggling and seeking help months before the January 2023 deaths of her three children.

By The Plain RecordUpdated August 18, 2026 at 4:42 PM EDT
Published August 18, 2026 at 2:49 PM EDT

The short answer

Susan Clancy testified that Lindsay Clancy was struggling and seeking help months before the January 2023 deaths of her three children. Susan Clancy, the former mother-in-law of Lindsay Clancy, testified on Tuesday in Plymouth Superior Court during the fourth week of a murder trial.

Updates (2)

  • Update — August 18, 2026 at 4:42 PM EDT: Lindsay Clancy's former mother-in-law testified that the defendant sought help for deteriorating mental health prior to the deaths of her three children.
  • Update — August 18, 2026 at 4:12 PM EDT: Family members testified about Lindsay Clancy’s declining mental health during her trial for the death of her three children in Massachusetts.
Former mother-in-law testifies in Lindsay Clancy murder trial

The Facts

Who
Lindsay Clancy, Susan Clancy, Patrick Clancy, and jurors.
What
Testimony from Susan Clancy in the Lindsay Clancy murder trial regarding the defendant's mental state.
When
Tuesday, August 18, 2026
Where
Plymouth Superior Court, Massachusetts
Why
The trial determines if Lindsay Clancy is criminally responsible for the deaths of her children or if she will be committed to a mental health facility due to postpartum psychosis.

Timeline of what happened

Key dates and decisions, in the order they occurred.

  1. November 30, 2022

    Lindsay Clancy sends text expressing fear regarding medication

  2. January 2023

    Three children killed and Lindsay Clancy paralyzed in suicide attempt

  3. August 18, 2026

    Susan Clancy testifies in fourth week of murder trial

Susan Clancy, the former mother-in-law of Lindsay Clancy, testified on Tuesday in Plymouth Superior Court during the fourth week of a murder trial. She stated that Lindsay Clancy had been "begging for help" and struggling in the months prior to the January 2023 deaths of her three children. The defense called Susan Clancy to provide accounts of the defendant's mental state leading up to the incident.

The testimony follows similar accounts provided the previous day by Lindsay Clancy’s mother and sister, who described her as becoming increasingly anxious, paranoid, and suicidal starting in the fall of 2022. Susan Clancy, who worked as a labor and delivery nurse like the defendant, told jurors she and Lindsay were close and described her as a "nurturing" and "loving" mother. The jury was shown text messages from November 30, 2022, in which Lindsay expressed fear regarding a perceived dependence on benzodiazepines.

Defense attorneys do not dispute that Lindsay Clancy killed her three children before attempting to take her own life, an act that left her paralyzed. Instead, the trial focuses on her state of mind. The defense argues that Clancy is not criminally responsible due to postpartum psychosis, while prosecutors contend she planned the killings and understood her actions. Lindsay and her former husband, Patrick Clancy, have since divorced.

The case centers on the specific medical diagnosis of postpartum psychosis, a condition that the defense claims affected Clancy's cognitive functions during the January 2023 incident. The trial's resolution will depend on how jurors weigh the testimony of family members and medical evidence against the prosecution's claims of premeditation. A verdict will establish whether the defendant is held legally accountable for the deaths of three children or is deemed to have lacked the mental capacity to be held responsible for those acts.

For the family members involved, including Patrick Clancy, who discovered the children in the family's basement, the trial provides a public record of the events leading up to the deaths. The proceedings are expected to continue in Plymouth Superior Court as both sides present evidence regarding the defendant's psychological history and actions. A specific date for the conclusion of the trial or the beginning of jury deliberations was not reported in the source.

Summaries are written by The Plain Record to state the facts of a story plainly and without political slant. See our editorial standards, or report a correction.

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Questions readers ask

What happened: Former mother-in-law testifies in Lindsay Clancy murder trial?

Testimony from Susan Clancy in the Lindsay Clancy murder trial regarding the defendant's mental state.

Who is involved?

Lindsay Clancy, Susan Clancy, Patrick Clancy, and jurors.

When did this happen?

Tuesday, August 18, 2026

Where did this happen?

Plymouth Superior Court, Massachusetts

Why does this matter?

The trial determines if Lindsay Clancy is criminally responsible for the deaths of her children or if she will be committed to a mental health facility due to postpartum psychosis.