The Lindsay Clancy case has moved through several major legal and investigative stages since the deaths of her three children in January 2023. The trial is now nearing its conclusion, with the defense having rested and prosecutors presenting rebuttal testimony.
Below is a chronological timeline of the major confirmed developments.
January 24, 2023 — The Children Die
Lindsay Clancy’s three children — 5-year-old Cora, 3-year-old Dawson and 8-month-old Callan — died at the family’s home in Duxbury, Massachusetts.
Prosecutors allege Clancy strangled the children. Her attorneys have not disputed that she caused their deaths, but they argue she was not criminally responsible because of severe mental illness.
After the killings, Clancy attempted suicide by jumping from a second-story window. She survived but suffered severe injuries that left her paralyzed.
January 2023 — Clancy Is Hospitalized
Following the killings and suicide attempt, Clancy was hospitalized for treatment.
Her mental condition became a central issue in the criminal investigation. The defense later argued that she was experiencing postpartum psychosis and other serious psychiatric symptoms when the children died.
Prosecutors eventually developed a different interpretation of her mental state, arguing that evidence showed planning and awareness.
2023 — Murder Charges
Clancy was charged with three counts of murder in connection with the deaths of her children.
She pleaded not guilty and maintained that she should not be held criminally responsible because of her mental condition.
The case subsequently became one of Massachusetts’ most closely watched criminal proceedings involving an insanity defense.
2023–2025 — Mental Health Becomes Central to the Case
As the case moved through the court system, the defense increasingly focused on Clancy’s psychiatric history.
Her attorneys argued that she experienced postpartum psychosis after the birth of Callan and that her condition deteriorated significantly before the killings.
The prosecution disputed that characterization and maintained that Clancy understood her actions.
The competing psychiatric explanations eventually became the foundation of the trial.
July 2026 — Jury Selection
Jury selection took place in July 2026 for the Plymouth Superior Court trial.
An 18-person jury was selected to hear the case. The proceedings were expected to focus heavily on whether Clancy understood what she was doing and whether she could control her behavior at the time of the killings.
July 27, 2026 — Opening Statements
Opening statements began July 27.
The prosecution presented a case centered on intentional conduct and planning. Prosecutors argued that Clancy deliberately killed her children and later attempted to make the deaths appear connected to a suicide attempt.
The defense did not deny that Clancy caused the children’s deaths. Instead, attorney Kevin Reddington argued that a severe psychiatric disorder left her unable to understand the nature or wrongfulness of her actions.
The defense specifically pointed to postpartum psychosis and bipolar disorder.
July 28–29, 2026 — Patrick Clancy Testifies
Patrick Clancy, Lindsay Clancy’s husband at the time of the killings and the children’s father, became one of the most significant witnesses.
Jurors heard his account of the day the children died and the events surrounding his discovery of them.
A 911 call connected to the tragedy was also played in court. The testimony provided jurors with an emotional account of the immediate aftermath.
Late July–Early August — Prosecution Presents Evidence
The prosecution called numerous witnesses as it built its case.
Jurors heard testimony from law enforcement officers, medical professionals, family members and people who had interacted with Clancy before the killings.
The prosecution also presented evidence involving Clancy’s mental-health treatment, medications, internet searches and other digital information.
A major prosecution argument was that her actions before the killings demonstrated planning rather than psychosis.
Early August — Jurors Visit the Duxbury Home
Jurors were taken to the former family home in Duxbury.
The visit allowed them to see the physical setting connected to the prosecution’s account of the killings.
The jury’s trip to the home became one of the notable developments during the opening weeks of testimony.
August 2026 — Mental Health Evidence Intensifies
As the trial progressed, both sides presented extensive evidence about Clancy’s psychiatric condition.
The defense highlighted symptoms, treatment and behavior that it says showed a worsening mental-health crisis.
Prosecutors challenged those conclusions and emphasized evidence they said was inconsistent with psychosis.
The trial also examined Clancy’s medications and treatment history in detail.
August 13, 2026 — Digital and Behavioral Evidence
Prosecutors presented evidence concerning Clancy’s digital activity, including searches and other information from before the killings.
The prosecution used this material to support its argument that Clancy was aware of what was happening and had engaged in planning.
The defense offered a different interpretation of the same broader history, arguing that her searches and behavior reflected a woman experiencing a serious psychiatric crisis.
August 17, 2026 — Prosecution Rests
The prosecution formally rested its case on Aug. 17 after more than two weeks of testimony.
By that point, dozens of witnesses had testified.
The prosecution’s case sought to establish that Clancy intentionally killed her children and remained capable of understanding right from wrong.
The defense then began presenting its witnesses.
August 18–20, 2026 — Defense Presents Mental Health Case
The defense called witnesses who described Clancy’s declining mental health before the killings.
Family members discussed changes they had observed in her behavior. Mental-health professionals also testified about her symptoms and treatment.
Defense witnesses supported the argument that Clancy was experiencing postpartum psychosis or another severe psychiatric condition.
The defense’s case also explored suicidal thoughts, hallucinations and other reported symptoms.
On Aug. 20, proceedings ended earlier than expected after only limited testimony. Judge William Sullivan indicated that closing arguments were approaching, although rebuttal testimony still had to be completed.
August 21, 2026 — Defense Rests
Aug. 21 marked a major turning point.
The defense rested its case after calling forensic psychiatrist Dr. Phillip Resnick as its final witness.
Resnick testified that he believed Clancy was experiencing postpartum psychosis when she killed her children. He described her as psychotic and testified about what he considered a command hallucination and a delusion of outside influence.
His testimony directly supported the defense’s claim that Clancy should not be held criminally responsible.
Clancy herself did not take the witness stand.
August 21, 2026 — Prosecution Begins Rebuttal
After the defense rested, prosecutors immediately began presenting rebuttal witnesses.
Forensic psychiatrist Dr. Avram Mack provided testimony that sharply contrasted with Resnick’s assessment.
Mack acknowledged that Clancy suffered from major depression but disputed the existence of psychosis, mania or hypomania at the time of the killings.
He testified that she retained the ability to control her impulses and understand right from wrong.
The competing psychiatric opinions have become one of the most important issues for the jury.
August 22, 2026 — Trial Nears Its Final Stage
As of Aug. 22, the trial has not reached a verdict.
The prosecution’s rebuttal remains the next immediate phase of the proceedings. Closing arguments are expected early next week, followed by jury instructions and deliberations.
The jury will ultimately have to determine whether Clancy is criminally responsible for the deaths of her three children.
The defense maintains that severe mental illness prevented her from understanding the nature or wrongfulness of her actions.
Prosecutors argue that the evidence shows intentional conduct and that Clancy retained the capacity to understand and control her actions.
What Comes Next
The expected sequence is:
- Prosecution completes rebuttal testimony.
- Both sides deliver closing arguments.
- Judge William Sullivan gives the jury legal instructions.
- Jurors begin deliberations.
- The jury returns a verdict.
No verdict has been announced as of Aug. 22, 2026.
The trial’s final outcome will depend on how jurors evaluate the extensive evidence and the sharply different psychiatric opinions presented by the prosecution and defense.