Lindsay Clancy Murder Trial Ends in Mistrial After Jury Deadlocks

A Massachusetts judge has declared a mistrial in the closely watched murder case against Lindsay Clancy after jurors failed to reach a unanimous verdict in the deaths of her three young children.

The decision came Friday, Sept. 4, after the jury told Judge William Sullivan that it remained deadlocked.

“With a heavy heart, we report we are unable to come to a unanimous decision. We will not be able to,” the jury wrote in a note to the court.

Sullivan then said he had no choice but to declare a mistrial.

But the case did not immediately end. At the request of Clancy’s defense attorney, Kevin Reddington, the judge agreed to delay formally entering the mistrial while the defense sought an emergency stay from the Massachusetts Supreme Judicial Court. The defense filed that request, which remained pending.

Jury Deadlocked After Five-Week Trial

Clancy, 36, was charged with killing her three children—5-year-old Cora, 3-year-old Dawson and 8-month-old Callan—in their Duxbury home in January 2023.

Both sides agreed that Clancy strangled the children with exercise bands before jumping from a second-story window in what authorities described as an apparent suicide attempt. The fall left her paralyzed from the waist down.

But the central question at trial was not whether Clancy killed her children. It was whether she was legally responsible for their deaths.

Prosecutors argued that Clancy knew what she was doing and understood that it was wrong. Her defense argued that she was suffering from severe postpartum psychosis and had been overmedicated, leaving her unable to understand or control her actions.

Jurors could have found Clancy guilty of first-degree murder, second-degree murder or manslaughter. They also could have found her not guilty or not guilty because of a lack of criminal responsibility.

Dispute Over a Juror

The deadlock became especially tense on Thursday, when the jury sent a note that appeared to suggest one juror was preventing a verdict.

Reddington asked the judge to remove that juror, but Sullivan refused.

“The note indicates that the juror has acknowledged doubt but refuses to apply it,” Sullivan said. “That note does not indicate that the juror refuses to follow the law.”

The jury returned to deliberations but ultimately told the court Friday that it could not reach a unanimous decision.

Mental Health at the Center of the Case

The trial focused heavily on Clancy’s mental health in the weeks and months surrounding the killings.

More than 80 witnesses testified during the five-week trial, including medical experts, friends, police officers and Clancy’s former husband, Patrick.

During closing arguments, prosecutor Jennifer Sprague acknowledged that Clancy had experienced serious mental health problems and had attempted to take her own life.

But Sprague told jurors that mental illness alone was not the deciding issue.

“That’s not the issue in this trial,” Sprague said. “The issue is whether, at the time she killed Cora, Dawson and Callan, she knew the difference between right and wrong, and whether she could conform her behavior to the requirements of the law.”

Sprague argued that Clancy killed her children because she was overwhelmed by depression and wanted to end her own suffering.

“She was exhausted. She was done. She didn’t want to try anymore. She felt damaged,” Sprague said.

Clancy’s attorney offered a sharply different explanation. Reddington argued that medication and poor medical care contributed to her mental breakdown.

“Because of the damn medicine and the lousy medical care that she got,” he told jurors while showing them photographs of Clancy before and after the killings.

What Happens Next?

The mistrial means the jury did not reach a verdict. The defense's emergency request to the state's highest court could affect what happens next.

If Clancy were ultimately found not guilty by reason of a lack of criminal responsibility, she would not necessarily have been released. Massachusetts law can allow a person in such a case to be committed for psychiatric treatment through potentially indefinite court orders.

The case has attracted national attention, not only because of the deaths of three children, but also because it has raised difficult questions about postpartum psychosis, psychiatric treatment and how the criminal justice system should handle severe mental illness.

For now, after five weeks of testimony and days of tense deliberations, the case remains unresolved.