Plymouth: In January 2023, Lindsay Clancy, a former labour and delivery nurse, became the centre of a tragedy at her home in Duxbury, Massachusetts, after her three young children were killed.
More than three years later, the six-week murder trial that sought to determine whether she was criminally responsible ended in a mistrial, after jurors failed to reach a unanimous verdict.
Behind the courtroom arguments was one deeply contested question: was Clancy criminally responsible for killing her children, or was she experiencing severe postpartum mental illness that impaired her ability to understand or control her actions?
January 24, 2023 | Three children killed
Lindsay Clancy, then 32, strangled her three children - five-year-old Cora, three-year-old Dawson and eight-month-old Callan - in the basement of the family home in Duxbury, Massachusetts.
She even tried to cut herself and jumped from the second floor to attempt suicide, leaving her paralysed. Clancy faces a mandatory sentence of life in prison if she is convicted on any of the first-degree murder charges she faces.
Signs of a deteriorating mental state and postpartum
Her family has said, before the tragedy, she was going through a deteriorated mental state. According to her former husband, Patrick Clancy, testified that she had become depressed, lost weight and began experiencing self harming thoughts.
Jurors heard testimony from Patrick Clancy, who said she had disclosed intrusive thoughts about harming their children in the weeks before the three youngsters were killed in January 2023.
Patrick Clancy said his then-wife's condition appeared to worsen between October and December 2022 after she began treatment for mental health issues
Clancy's family members took the stand as some of the first defence witnesses to be called after prosecutors rested their case.
Under questioning by Clancy's defence lawyer, her mother, Paula Musgrove, on August 17 said her daughter had loved her children and was dedicated to them.
But Musgrove said that her daughter once told her and Patrick Clancy that she had thoughts of harming the children.
Clancy's mother in law, Susan Clancy, on August 18 described her as a "wonderful mother," but that she was anxious, sad and "begging for help."
July 27, 2026 | Trial begins
The murder trial opened in Massachusetts with sharply different accounts of what happened.
Prosecutors argued that Clancy had acted deliberately and planned the killings.
Assistant District Attorney Shanan Buckingham told jurors that Clancy knew her husband would be away from the house, took the children to the basement and killed them before attempting suicide.
“This was not a woman in the throes of psychosis,” Buckingham said. “This was a woman who acted intentionally, rationally and swiftly to accomplish a very specific goal: to kill.”
The defence offered a fundamentally different explanation.
Attorney Kevin Reddington argued that Clancy had suffered postpartum mental illness and psychosis, pointing to her worsening psychiatric condition and treatment.
July 29 | Patrick Clancy describes the aftermath
Patrick Clancy described on July 29 the moment he returned home to find his children had been strangled in his basement while he was picking up dinner.
His testimony became one of the most emotional moments of the trial.
August 12 | Medical evidence takes centre stage
Clancy appeared in court, crying as a medical examiner testified.
Proceedings were briefly delayed, and when the trial resumed, Clancy was seen resting her head on a table and covering her face.
During the trial, jurors have heard sharply different accounts of what led to the killings. Defence lawyers said Clancy was suffering from postpartum mental illness, while prosecutors argued the deaths were the result of a deliberate and planned act
August 13 | Crime scene evidence shown to jury
Crime scene footage from the Duxbury, Massachusetts, home where Clancy's three children died was played for jurors at her murder trial.
State Police Trooper Joshua McKelligan testified that he recalled blood on the floor of the master bedroom, as prosecutors showed video and photographs from the house.
Jurors also saw Museum of Science surveillance footage from January 8, 2023, showing Clancy and her family at an exhibit, with McKelligan testifying that she interacted with the children.
August 17–18, 2026 | Family describes a mother in distress
Clancy's mother and former mother-in-law testified about her deteriorating mental health, describing her as a loving mother who had become anxious, depressed and increasingly desperate for help. They also testified that she had disclosed thoughts about harming her children.
August 21 | Psychiatrists disagree
The central battle over Clancy's mental state came into sharper focus when psychiatric experts testified.
The court on August 21 heard evidence from psychiatrists Phillip Resnick and Avram Mack on Clancy's mental health.
Resnick said Clancy was unable to "conform her conduct to the requirements of the law" at the time of the incident due to her mental disease. The prosecution's rebuttal witness, Mack, said there was no feature that indicated that she did not have that capacity in the time leading up to incident, and that she was "aware in those moments beforehand, that that was wrong or against the law and that she could be punished, for such an act."
August 24 | Defence seeks mistrial
The judge in the trial for Clancy dismissed a defense attempt for a mistrial on Monday, after a psychologist weighed on the defendant's suicide attempt and the Catholic faith.
Defense Attorney Kevin Reddington disputed the testimony and brought up the concept of "mortal sin" in Catholicism and called for a mistrial. While Judge William Sullivan supported the defense's objection, he rejected the claim of a mistrial.
August 27 | Closing arguments
The trial of Clancy neared its conclusion as her lawyer delivered a closing argument aimed at convincing jurors to find that she did not intend to murder the children but had been driven by postpartum psychosis.
Prosecutors acknowledged that she had suffered mental illness but argued that the critical issue was whether she knew right from wrong and could conform her conduct to the law when she killed the children.
The two sides therefore offered jurors two competing explanations for the same events.
September 1 | Jury reaches an impasse
Jurors notified Judge Sullivan that they were unable to reach a unanimous decision. “After many hours of deliberation, we are unable to come to a unanimous decision”, said the Judge William Sullivan.
September 4 | Jury deadlocks again
Judge Sullivan said "Counsel, it's my understanding that the Supreme Judicial Court issued their order that the emergency request for relief was denied and the temporary stay is lifted and so it would be my intention at this time to call the jurors back in and as I indicated to you before to declare a mistrial."
Speaking to reporters outside the courthouse on Friday Reddington, the defence attorney of Lindsay, framed the mistrial as a win for the defense and said Clancy would be ready for another trial should prosecutors pursue one.
September 4 | Mistrial declared
With the jury still deadlocked, Judge Sullivan declared a mistrial. There was no verdict on whether Clancy was criminally responsible for the deaths of her three children.
"I think if anything, this case showed clearly and unequivocally, the woeful deficiency that women have when they're pregnant, when they have babies, and God forbid when they're on medication because of postpartum depression, postpartum psychosis.
It's just horrible what we saw in this trial and maybe things have to change. And I hope that, you know, this case gave it an opportunity to turn it around. Might be the spark that lights the fire," responded defence attorney Kevin Reddington.
What happens next?
A mistrial is declared by the judge when a trial cannot proceed to a verdict. In Clancy's case, the jury remained deadlocked, leaving the judge with no verdict to record.
But a mistrial does not resolve the underlying criminal charges. Prosecutors can potentially retry Clancy, pursue another legal resolution or decide not to continue the case.
The Clancy case has also brought renewed attention to postpartum psychosis and the difficulties of recognising and treating severe mental-health problems during the period following childbirth.
But whatever happens next in court, the debate surrounding the case is likely to extend beyond Clancy herself - into the way maternal mental health is understood, treated and addressed by the legal system.
(With the agency inputs from Reuters)