Lindsay Clancy, a 36-year-old former labour and delivery nurse from Massachusetts, United States, became the subject of a closely watched criminal case after the deaths of her three young children in January 2023.
Clancy admitted to killing her children but argued that she was not criminally responsible because she was experiencing postpartum psychosis, a severe mental health condition that can develop after childbirth.
Her trial ended in a mistrial on September 4, 2026, after a 12-member jury failed to reach a unanimous verdict.
Who Was Lindsay Clancy?
Lindsay Marie Clancy, née Musgrove, was born in 1990 in Wallingford, Connecticut.
She attended Quinnipiac University, trained as a nurse and worked at Massachusetts General Hospital, where she cared for women during childbirth.
Clancy married Patrick Clancy in 2016. The couple lived in Duxbury, Massachusetts, and had three children: Cora, born in December 2017; Dawson, born in September 2019; and Callan, born on May 26, 2022.
Following the births of her first two children, Clancy experienced postpartum anxiety but later recovered.
After Callan was born, however, her mental health reportedly deteriorated significantly. She experienced severe anxiety, depression, insomnia, emotional numbness, intrusive thoughts about harming herself and her children, and suicidal thoughts.
She sought treatment from several doctors and was prescribed antidepressants, anti-anxiety medication and antipsychotic drugs.
In early January 2023, she voluntarily admitted herself to McLean Hospital, a psychiatric facility. She was discharged about three weeks before the deaths of her children.
Her defence later argued that she had been misdiagnosed and overmedicated, contributing to the deterioration of her mental state and the development of postpartum psychosis.
What Happened on January 24, 2023?
On Tuesday, January 24, 2023, Clancy took Cora to a routine medical appointment. She later played with the children in the snow and exchanged apparently normal messages with her husband.
That afternoon, according to evidence presented in court, she searched online for children’s laxative medication and a restaurant and checked travel times.
At about 5pm, she asked Patrick to leave the house to purchase takeaway food and medication.
Patrick was away for approximately 55 minutes.
During that period, prosecutors said Clancy took her three children to the basement and killed them using exercise resistance bands.
She then injured herself and jumped from a second-storey bedroom window in what was described as an apparent suicide attempt. The fall left her paralysed from the waist down.
When Patrick returned, he found the house unusually quiet. After noticing blood in the master bedroom and an open window, he found his injured wife outside.
A 911 call later played in court captured Patrick’s reaction after he discovered the children.
Cora and Dawson were pronounced dead that night.
Callan was found in cardiac arrest and resuscitated before being flown to Boston Children’s Hospital.
Doctors determined that he had no brain activity. He remained on life support until it was withdrawn on January 27, 2023, when he was pronounced dead at 11:18am. He was eight months old.
What Happened After the Killings?
While partially intubated in hospital, Clancy reportedly wrote on a whiteboard: “Do I need an attorney?”
Prosecutors later cited the message as evidence that she understood the seriousness of what had happened.
Patrick initially publicly forgave his wife and appealed for compassion, describing her as a loving mother who was battling severe mental illness.
The couple later divorced. Patrick has since remarried and co-founded a foundation in memory of their three children.
Clancy was charged with three counts of first-degree murder and related offences. She has been held at Tewksbury State Hospital, a psychiatric facility.
Defence: Clancy Was Suffering From Postpartum Psychosis
Clancy did not deny killing her children.
Her lawyer, Kevin Reddington, entered a plea of not guilty by reason of lack of criminal responsibility, the Massachusetts equivalent of an insanity defence.
The defence argued that Clancy was suffering from postpartum psychosis, which can involve hallucinations, delusions and command voices.
Expert witnesses, including forensic psychiatrist Dr Philip Resnick, testified that Clancy reported hearing a male voice ordering her to kill her children and then herself.
The defence said she felt controlled by the voice, describing the experience as being controlled “like a puppet.”
Reddington also argued that Clancy had repeatedly sought professional help but received inadequate treatment for her worsening mental condition.
Prosecution: She Remained Criminally Responsible
Prosecutors acknowledged Clancy’s mental health difficulties but argued that she remained criminally responsible for the killings.
They pointed to evidence they said demonstrated planning, including sending her husband out of the house and the manner in which the children were killed.
Prosecutors also highlighted her request for an attorney after the incident as evidence that she understood the consequences of her actions.
Assistant District Attorney Shanan Buckingham told jurors that the evidence would show Clancy deliberately killed her children.
Jury Fails to Reach Verdict
The trial began in July 2026 at Plymouth Superior Court and lasted approximately five weeks.
More than 80 witnesses testified, including Patrick Clancy, relatives, medical experts and emergency responders.
The jury also heard the 911 call and evidence relating to the crime scene.
After seven days of deliberations, jurors informed the court that they could not reach a unanimous verdict.
Reports indicated that the jury was divided 11–1, with the majority reportedly favouring a finding of not guilty by reason of insanity.
On September 4, 2026, Judge William Sullivan declared a mistrial.
Clancy’s lawyer subsequently made an emergency appeal to the Massachusetts Supreme Judicial Court concerning the holdout juror, but the appeal was denied.
What Happens Next?
A mistrial means Clancy was neither convicted nor acquitted. The murder charges remain pending.
She continues to be held at Tewksbury State Hospital while prosecutors determine how to proceed.
Plymouth County District Attorney Timothy Cruz could seek a new trial, negotiate a plea agreement or pursue another legal option.
A status hearing is scheduled for later in September 2026.
Why the Case Matters
The Clancy case has renewed debate over postpartum mental health, the detection and treatment of postpartum psychosis, psychiatric care for new mothers and the role of severe mental illness in determining criminal responsibility.
It has also raised difficult questions about how the justice system should handle cases involving parents accused of killing their children while experiencing serious psychiatric disorders.
