What to know about Lindsay Clancy, the US mother charged with killing her three children

Lindsay Clancy, a 36-year-old former labour and delivery nurse from Massachusetts, United States, became the centre of one of the country’s most closely watched criminal cases after she killed her three young children in January 2023.

PUNCH Online had reported that Clancy admitted to the killings but maintained that she was not criminally responsible because she was suffering from postpartum psychosis, a rare and severe mental illness that can occur after childbirth. Her trial ended in a mistrial on 4 September 2026 after a 12-member jury failed to reach a unanimous verdict.

Lindsay Marie Clancy (née Musgrove) was born in 1990 in Wallingford, Connecticut. She studied at Quinnipiac University, trained as a nurse and worked at Massachusetts General Hospital, where she cared for women during childbirth.

She married Patrick Clancy in 2016. The couple settled in Duxbury, Massachusetts, and had three children: Cora, born in December 2017; Dawson, born in September 2019; and Callan, born on 26 May 2022.

After the births of her first two children, Clancy experienced postpartum anxiety but recovered. Following Callan’s birth, her mental health deteriorated sharply. She suffered severe anxiety, depression, insomnia, emotional numbness, intrusive thoughts of harming herself and her children, and suicidal ideation.

She sought treatment from several doctors and was prescribed a combination of antidepressants, anti-anxiety medication and antipsychotic drugs. In early January 2023, she voluntarily admitted herself to McLean Hospital, a psychiatric facility, and was discharged about three weeks before the killings.

Her defence later argued that she had been misdiagnosed and overmedicated, worsening her condition into full postpartum psychosis.

The day of the attack

On Tuesday, 24 January 2023, Clancy took Cora to a routine medical appointment. She later played in the snow with the children and exchanged normal text messages with her husband.

That afternoon, she searched online for children’s laxative medicine and a restaurant, and checked travel times. At about 5pm, she asked Patrick to leave the house to buy takeaway food and the medicine.

While he was away for approximately 55 minutes, Clancy took the three children to the basement and strangled them one after another with exercise resistance bands. She then cut her wrists and neck and jumped from a second-storey bedroom window in an apparent suicide attempt. The fall left her paralysed from the waist down.

When Patrick returned, he found the house unusually quiet. He discovered blood in the master bedroom and an open window before finding his injured wife in the backyard.

On the 911 call later played in court, he can be heard speaking to her and then screaming after discovering the children: “She killed the kids!” according to court records reported by The Boston Globe.

Cora and Dawson were pronounced dead that night.

Callan was found in cardiac arrest, resuscitated and flown to Boston Children’s Hospital. Doctors determined he had no brain activity. He remained on life support until he was officially declared dead on Friday, 27 January 2023, at 11:18am after life support was withdrawn. He was eight months old, according to the Plymouth County District Attorney’s Office and reports by the Associated Press.

Immediate aftermath

While partially intubated in hospital, Clancy wrote on a whiteboard: “Do I need an attorney?” Prosecutors later cited this as evidence that she understood what she had done.

Patrick initially publicly forgave his wife and urged compassion, describing her as a loving mother battling severe mental illness. The couple later divorced. Patrick has since remarried and co-founded a foundation in memory of the 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 and prosecution arguments

Clancy never denied 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 she was suffering from postpartum psychosis, which can cause hallucinations, delusions and command voices. Expert witnesses, including forensic psychiatrist Dr Philip Resnick, testified that she heard a male voice ordering her to kill the children and then herself, and that she felt controlled “like a puppet.”

Reddington said she had made repeated attempts to seek help but received inadequate treatment.

Prosecutors acknowledged her mental health problems but insisted that she remained criminally responsible. They pointed to evidence of planning — sending her husband out of the house, the methodical nature of the killings, and her later request for a lawyer. Assistant District Attorney Shanan Buckingham told jurors that the evidence would show Clancy had deliberately killed her children.

The trial and mistrial

The trial began in July 2026 at Plymouth Superior Court and lasted about five weeks. More than 80 witnesses testified, including Patrick Clancy, relatives, medical experts and emergency responders. The jury heard the 911 call and crime-scene evidence.

After seven days of deliberations, the jury reported that it could not reach a unanimous verdict. Reports indicated an 11–1 split in favour of finding Clancy not guilty by reason of insanity.

On 4 September 2026, Judge William Sullivan declared a mistrial, according to PUNCH Newspaper.

Clancy’s lawyer made an emergency appeal to the Massachusetts Supreme Judicial Court over the holdout juror, but it was denied.

What happens next

A mistrial means Clancy was neither convicted nor acquitted. The murder charges remain. She continues to be held at Tewksbury State Hospital.

Plymouth County District Attorney Timothy Cruz will decide whether to retry the case with a new jury, pursue a plea agreement or take another course. A status hearing is scheduled for later in September 2026.

Why the case matters

The Lindsay Clancy case has fuelled a wider debate in the United States and also Nigeria about postpartum mental health, psychiatric care for new mothers, the recognition of postpartum psychosis, and how the criminal justice system should treat parents who kill their children while experiencing severe mental illness.