More than three and a half years after Lindsay Clancy strangled her three young children inside their Duxbury, Massachusetts home, a jury is now just hours away from deciding not whether she did it, but whether she can be held criminally responsible for it at all.
What Happened
On January 24, 2023, Clancy killed her three children — 5-year-old Cora, 3-year-old Dawson and 8-month-old Callan — by strangulation inside the family's Duxbury home, then attempted suicide outside the house. Prosecutors say she sent her husband, Patrick, out on an errand to pick up takeout and medication, creating a window in which to carry out the killings. Clancy has pleaded not guilty by reason of insanity.
Why It Matters
This isn't a whodunit. Both sides agree Clancy killed her children. What a Plymouth County jury must now decide is a much narrower legal question: whether she was "criminally responsible" at the time, meaning she understood her actions were wrong and could have controlled them. If convicted of first-degree murder, Massachusetts law mandates life in prison without parole; a manslaughter conviction, which the judge is now allowing the jury to consider, carries a far shorter sentence; a successful insanity defense would send her to a psychiatric facility rather than prison. The case has become one of the most closely watched tests of the insanity defense and postpartum psychosis in recent U.S. legal history.
What We Know
The trial opened July 20 at Plymouth County Superior Court. Prosecutors called more than 70 witnesses over roughly a month, arguing Clancy "acted intentionally, rationally and swiftly," pointing to her arranging her husband's absence and her later statement, on waking in the hospital, that she was "horrified" and asked for a lawyer. The defense called about 10 witnesses, arguing Clancy suffered a severe, medication-worsened postpartum psychosis over several months beforehand, including hallucinations of a "commanding male voice," insomnia and confusion. Evidence concluded Wednesday, August 26. Judge William Sullivan has given each side one hour for closing arguments on Thursday, August 27, after which jurors will be instructed and sent to deliberate — a process attorneys now expect to begin Friday, though the timeline has shifted more than once over the trial's final week.
Clancy had no control over her actions due to severe mental illness.
Dr. Phillip Resnick, defense psychiatric expert
What People Are Saying
The dueling psychiatric experts are the heart of the case. For the defense, Dr. Phillip Resnick testified Clancy's mental state left her unable to control her actions. For the prosecution, Dr. Avram Mack and forensic psychologist Dr. Kirk Heilbrun challenged the postpartum psychosis diagnosis and testified Clancy could still distinguish right from wrong when she killed her children. Treating providers who saw Clancy before the killings have testified they did not observe signs of psychosis at the time.
What Happens Next
Closing arguments and jury instructions are expected to wrap Thursday, with deliberations likely starting Friday — though attorneys and the judge have adjusted that timeline several times in the trial's closing days, so an exact start time isn't confirmed. Because jurors can now choose among first-degree murder, manslaughter or not guilty by reason of insanity, the deliberation could take anywhere from a day to considerably longer given the volume of expert testimony they have to weigh.
Key Takeaway
After more than a month of dueling psychiatric testimony, the Lindsay Clancy case comes down to a single legal question a jury must now answer: not what happened, but whether her mind was capable of knowing it was wrong.
