A factual explainer. Updated September 4, 2026.
A Note Before We Begin
Few criminal cases in recent memory have generated the emotion this one has. Three young children are dead. Their mother is the person charged. The defense raised is one that many people find difficult to accept, and that many others find self-evident. People hold strong, sincere, and irreconcilable views about what justice requires here, and those views are held by reasonable people on every side of the question.
This article does not take a position. We are not offering an opinion on whether Lindsay Clancy is criminally responsible, on how the jury should have voted, on what prosecutors should do next, or on the merits of the insanity defense as a matter of policy. Our purpose is narrower and, we hope, more useful: to set out what has actually happened in this case, what the governing legal rules are, and what procedural paths remain open, so that readers following the coverage have an accurate framework for understanding it.
Where the facts are contested, we say so. Where the law is unfamiliar, we explain it. We do not speculate about outcomes. Sources are listed at the end.
What Happened
On January 24, 2023, in Duxbury, Massachusetts, three children died in their family home: Cora, age 5; Dawson, age 3; and Callan, an infant. Their mother, Lindsay Clancy, a labor and delivery nurse then in her early thirties, was found seriously injured after a fall from a second-story window. She survived, was hospitalized for an extended period, and was left with paralysis. [1]
A Plymouth County grand jury indicted Clancy on three counts of first-degree murder. She pleaded not guilty and has been held without bail since, for more than three years, at a state psychiatric facility rather than a county jail. Through counsel, she has never disputed that she caused her children’s deaths. The disputed question, from the earliest hearings through the trial itself, has been whether she was criminally responsible when she did. [1][2]
The case moved slowly. Pretrial litigation spanned roughly three years and included disputes over Clancy’s medical and psychiatric records, over her competency to stand trial, and over the prosecution’s efforts to obtain materials connected to a magazine profile of the family. The trial date was continued more than once. [3]
The Trial
Trial began in Plymouth Superior Court before Judge William Sullivan, with opening statements on July 27, 2026. Testimony ran into late August across roughly four weeks of trial days. [3]
The prosecution’s position, advanced by the office of Plymouth County District Attorney Timothy Cruz and argued at trial by Assistant District Attorney Jennifer Sprague, was that Clancy understood the nature and the wrongfulness of her conduct. Prosecutors argued that she was profoundly depressed and suicidal, that her actions reflected planning rather than psychosis, and that she could conform her behavior to the law and chose not to. Their expert witnesses, forensic psychiatrists retained by the Commonwealth, testified that she was criminally responsible. [1][4]
The defense, led by attorney Kevin Reddington, argued that Clancy was in the grip of postpartum psychosis, a rare and severe postpartum psychiatric illness that is distinct from postpartum depression. The defense presented evidence of her documented mental-health deterioration in the preceding months, the volume and rapid adjustment of the psychiatric medications she had been prescribed, and expert testimony from forensic psychiatrists and psychologists concluding that she could not appreciate the wrongfulness of her conduct or conform her behavior to the law. [3][4]
Both sides called treating clinicians, first responders, medical examiners, family members, and retained experts. Closing arguments were delivered on August 27, 2026. [3]
The Law the Jury Was Asked to Apply
This is the part most often lost in the coverage, and it matters.
Massachusetts does not use the phrase “insanity defense” in its jury instructions. The doctrine is called lack of criminal responsibility, and it comes from the Supreme Judicial Court’s 1967 decision in Commonwealth v. McHoul. Under that standard, a defendant is not criminally responsible if, as a result of mental disease or defect, she lacked substantial capacity either to appreciate the wrongfulness of her conduct, or to conform her conduct to the requirements of the law. Either prong is sufficient on its own. [5][6]
The burden is on the prosecution, not the defendant. This is the feature that most distinguishes Massachusetts from the majority of American jurisdictions. In most states, and in federal court, a defendant raising insanity must prove it. In Massachusetts, once the issue is properly raised, the Commonwealth must prove criminal responsibility beyond a reasonable doubt, the same standard that applies to every other element of the offense. A juror who is genuinely uncertain whether the defendant was criminally responsible is instructed to resolve that uncertainty in the defendant’s favor. [5]
A verdict of not guilty by reason of lack of criminal responsibility is not an immediate release. The court may order an evaluation, and the Commonwealth, the facility superintendent, or the medical director may seek civil commitment if the statutory criteria are met. Any commitment is subject to judicial review and ends when those criteria are no longer satisfied. [7]
First-degree murder in Massachusetts carries a mandatory sentence of life without the possibility of parole. A conviction of first-degree murder carries that sentence by statute. A plea to those charges therefore would not permit a negotiated sentence. Any negotiated disposition would require the Commonwealth to amend or reduce the charges, and no such agreement was publicly reported. [8][9]
Where It Stands
The jury, nine women and three men, began deliberating on August 28, 2026. Over the following days they reported being deadlocked more than once. Judge Sullivan delivered what Massachusetts practice calls a Tuey-Rodriguez instruction, the state’s version of the charge given to a deliberating jury that has reported an impasse. It urges jurors to continue their efforts and to reconsider their positions, while making clear that no juror should surrender a conscientiously held view. [4][10]
Deliberations continued. At one point the foreperson sent a note concerning a juror. The defense moved to remove that juror, and Judge Sullivan denied the motion, finding that the note did not establish that the juror was refusing to follow the law. The defense then sought emergency relief from a single justice of the Supreme Judicial Court. That petition was denied. [2][10]
On September 4, 2026, after seven days of deliberation, Judge Sullivan declared a mistrial. The foreperson’s final note read: “It is with a heavy heart that we report we are unable to come to a unanimous decision, and we will not be able to.” [1][2]
A mistrial is not an acquittal, and it is not a conviction. It means the jury could not reach the unanimous verdict the law requires, and the proceeding ended without a resolution on the merits. The indictments remain pending.
Judge Sullivan scheduled a status conference for September 29, 2026, at which the parties are expected to address next steps. The defense is also expected to pursue a request for a required finding of not guilty. [2][11]
Where It May Go Next
Several paths are procedurally available. We are not predicting which will be taken.
Retrial. When a mistrial is declared because a jury is genuinely deadlocked, double jeopardy ordinarily does not bar a second trial. The controlling principle, from United States v. Perez (1824) and its modern descendants, is that a mistrial declared out of “manifest necessity,” and a hung jury is the classic example, permits the prosecution to try the case again. If the Commonwealth elects to retry, the case would require a new trial date and a new jury.
Reduction or resolution of the charges. Prosecutors have discretion over what to charge. If the office were to amend or reduce the indictments below first-degree murder, a negotiated disposition would become possible in a way it was not before, because the mandatory sentence of life without parole would no longer apply. [8]
Dismissal. Prosecutors may decline to retry a case, entering a nolle prosequi. This is comparatively rare in homicide cases. As of the date of this article, the District Attorney has not publicly announced whether the Commonwealth will retry the case. Asked about it on the day of the mistrial, District Attorney Cruz said there would be “no decisions made today regarding that.” [2]
Custody and bail. With no conviction and no verdict, the defense may seek pretrial release or a bail determination pending the Commonwealth’s decision. Any such motion would be decided by the court under Massachusetts bail law, which considers both risk of flight and dangerousness.
Appellate activity. Rulings made during the first trial, including evidentiary rulings, the handling of the juror issue, and the instructions given, may become the subject of litigation in any second trial, and could be raised on appeal if there is eventually a conviction.
Why Cases Like This Are Hard, in Purely Legal Terms
Setting aside the human dimension entirely, this case sits at the intersection of three things the legal system handles with difficulty: a mental-health question about which qualified clinical experts genuinely disagree; a burden of proof that requires jurors to acquit if they are left with reasonable doubt on that question; and a charge that admits of no middle ground at sentencing. Add a unanimity requirement, and a divided jury becomes a foreseeable outcome rather than an aberration. That observation is descriptive. It is not a criticism of any participant.
If This Subject Is Difficult for You
Postpartum psychiatric illness is real, it is treatable, and in its milder forms it is more common than most people realize. If you or someone you know is struggling after childbirth, Postpartum Support International maintains a helpline at 1-800-944-4773, and the 988 Suicide and Crisis Lifeline is available by call or text at 988.
Sources
[1] WBUR, “Judge declares mistrial in Clancy case after jurors, with ‘heavy heart,’ fail to reach verdict,” September 4, 2026. https://www.wbur.org/news/2026/09/04/lindsay-clancy-murder-trial-verdict-massachusetts
[2] PBS NewsHour, “Key things to know about Lindsay Clancy’s case after judge declares mistrial,” September 4, 2026. https://www.pbs.org/newshour/nation/key-things-to-know-about-lindsay-clancys-case-after-judge-declares-mistrial
[3] Court TV, trial coverage and timeline, Lindsay Clancy trial. https://www.courttv.com/news/lindsay-clancy-trial-opening-statements-set-for-mom-accused-of-killing-her-3-children/
[4] Boston.com, “Jurors in Lindsay Clancy trial recess for the day after earlier reporting another deadlock,” September 2, 2026. https://www.boston.com/news/crime/2026/09/02/lindsay-clancy-trial-verdict-watch-wednesday-september-2/
[5] WBUR, “As Clancy jurors remain deadlocked, what to know about the ‘insanity defense,’” September 1, 2026. https://www.wbur.org/news/2026/09/01/massachusetts-lindsay-clancy-insanity-defense-criminal-liability
[6] Commonwealth v. McHoul, 352 Mass. 544 (1967). https://law.justia.com/cases/massachusetts/supreme-court/1967/352-mass-544-2.html
[7] Mass. Gen. Laws ch. 123, § 16. https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXVII/Chapter123/Section16
[8] Mass. Gen. Laws ch. 265, § 2. https://malegislature.gov/Laws/GeneralLaws/PartIV/TitleI/Chapter265/Section2
[9] CBS Boston, “Why didn’t Lindsay Clancy take a plea deal ahead of her murder trial? Her lawyer explains.” https://www.cbsnews.com/boston/news/lindsay-clancy-plea-deal-possibility/
[10] ABC News, live updates, Lindsay Clancy trial, September 4, 2026. https://abcnews.com/GMA/News/live-updates/lindsay-clancy-trial-jurors-resume-deliberations/?id=136086599
[11] Associated Press, live coverage of the Lindsay Clancy trial, September 4, 2026. https://apnews.com/live/lindsay-clancy-trial-09-04-2026
This article is provided for general informational and educational purposes only. It is not legal advice, it does not create an attorney-client relationship, and it should not be relied upon as a statement of the law in any particular jurisdiction. The Law Firm of Brian S. Brijbag, PLLC is a Florida civil practice and is not involved in this case. Massachusetts criminal law and procedure differ in material respects from Florida law. Facts are drawn from published court records and news reporting as of the date above and may change as the case proceeds.
