Lindsay Clancy Trial: Judge Denies Mistrial as Prosecution Rebuttal Nears End

On Monday, August 24, 2026, the Lindsay Clancy murder trial entered a late stage at Plymouth Superior Court in Plymouth, Massachusetts, as prosecutors called rebuttal witnesses after the defense rested its insanity case. Judge William Sullivan denied a defense motion for a mistrial following testimony about Clancy’s Catholic upbringing and the concept of mortal sin, but he sharply reprimanded the prosecution, struck the remarks from the record, and told jurors to disregard them. Court ended early for the day, with closing arguments expected as soon as Wednesday, August 26.

Clancy, 36, is charged with killing her three children — Cora, 5, Dawson, 3, and Callan, 8 months — at the family’s Duxbury home on January 24, 2023. Her attorney does not dispute that she caused their deaths. The defense argues she was not criminally responsible because of postpartum psychosis, bipolar disorder, and medication effects, and has pleaded not guilty by reason of insanity.

Editor’s note: This article draws on reporting from the Associated Press (via Scripps News), ABC News, NBC Connecticut, Boston 25 News, and Yahoo News, August 24, 2026.

Background: The Clancy case

Prosecutors say Clancy strangled the children after sending her then-husband Patrick Clancy out on errands, then jumped from a second-story window. She survived but was paralyzed from the waist down. The killings drew national attention to postpartum mental illness and the limits of maternal-care screening.

Detail	Information
Defendant	Lindsay Clancy, 36, former nurse
Victims	Cora (5), Dawson (3), Callan (8 months)
Date of killings	January 24, 2023
Location	Duxbury, Massachusetts
Defense theory	Postpartum psychosis + bipolar disorder; wrong antidepressants worsened condition
Prosecution theory	Clancy understood what she was doing and is criminally responsible
Possible outcomes	Conviction on murder charges, or commitment to a state hospital if found not guilty by reason of insanity

The defense rested Friday, August 21, after forensic psychiatrist Dr. Phillip Resnick testified. Prosecutors then began a short rebuttal phase to challenge the defense’s psychiatric evidence.

What happened on August 24

Day 19 of the trial focused on prosecution rebuttal witnesses:

• Dr. Avram Mack, a psychiatrist, testified about Clancy’s mental state around the killings.
• Dr. Kirk Heilbrun, a forensic psychologist who evaluated Clancy at Tewksbury State Hospital, followed. He described interviewing Clancy in April 2023 and discussed her statements that she told each child to “go with God” during the killings.

Heilbrun then referenced Clancy’s Catholic upbringing and began to describe asking her whether suicide is considered a mortal sin in Catholic teaching. Defense attorney Kevin Reddington objected, prompting a sidebar and recess.

When court resumed, Reddington moved for a mistrial, calling the line of testimony “intentional misconduct on the part of the prosecution” for injecting Roman Catholic faith into the proceedings.

Prosecutor Jennifer Sprague said she had not asked about religion and that Heilbrun was explaining his own reasoning, not trying to inflame the jury. Sullivan denied the mistrial motion but warned the Commonwealth to speak with the witness about permissible testimony.

The judge then brought the jury back and instructed them that Heilbrun’s comments about Catholic dogma were “immaterial, irrelevant and to be disregarded.” Several jurors appeared surprised, according to courtroom reporters. Sullivan dismissed the jury for the rest of the day.

The mistrial dispute

This was not the first time religion surfaced at trial. Last week, during cross-examination of Patrick Clancy’s mother, prosecutor Shanan Buckingham asked whether she was an active member of the Catholic Church and whether Clancy was aware that murder is considered a mortal sin. Sullivan told jurors then not to consider that testimony, and the defense did not seek a mistrial at that time.

Reddington said Monday’s episode was different because prosecutors had been warned and raised the same theme again through a rebuttal witness.

Party	Position
Defense (Reddington)	Repeated religious references prejudice the jury and warrant a mistrial
Prosecution (Sprague)	No intentional misconduct; witness was explaining evaluation rationale
Judge (Sullivan)	Mistrial denied; testimony struck; jury instructed to ignore religion

Sullivan said Heilbrun would finish testimony on Tuesday, August 25, followed by a hearing on the charges. Both sides are then expected to deliver closing arguments, with deliberations to follow in one of Massachusetts’ most closely watched criminal trials in years.

Where the trial stands

The case turns on whether jurors believe Clancy lacked criminal responsibility because of severe mental illness at the time of the killings — not on whether she committed the acts.

If convicted of murder, Clancy faces a prison sentence. If found not guilty by reason of insanity, she would likely be committed to a state psychiatric facility rather than released.

Monday’s ruling kept the trial on track despite the courtroom drama. The rebuttal phase was always expected to be brief; delays to closing arguments came because prosecutors said they still had witnesses to call after the defense rested.

Families on both sides have followed the proceedings under intense media scrutiny since the 2023 killings. Mental-health advocates have pointed to the case as evidence that postpartum psychiatric crises remain under-recognized, while prosecutors have emphasized the children’s deaths and Clancy’s planning in the hours before the killings.

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Discussion

The Clancy trial sits at the intersection of criminal law, psychiatry, and a tragedy that has no simple resolution.

1. When mental illness is the central defense, should a jury ever hear testimony about a defendant’s religious beliefs?

Sullivan twice told jurors to disregard religion — but the defense argues the damage was already done. Where should courts draw the line between context and prejudice?

2. How should society balance accountability with compassion in postpartum psychosis cases where a parent admits killing their children?

If Clancy is found not guilty by reason of insanity, is hospital commitment an adequate response — or does the outcome feel unjust to victims’ families regardless of diagnosis?

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This article is news reporting and general legal information, not legal advice. Trial outcomes and sentencing depend on jury findings and Massachusetts law.