An Unexpected Halt in the Courtroom

The Lindsay Clancy trial came to a sudden stop on Monday afternoon inside Plymouth Superior Court, after a prosecution witness veered into a discussion of Catholic belief while describing his interview with the defendant. Within minutes, defense counsel was on its feet asking for a mistrial, jurors were escorted out, and the day’s proceedings were effectively over.

Judge William Sullivan ultimately refused to throw out the trial. He did, however, deliver a sharp rebuke to the prosecution before dismissing the panel until Tuesday morning.

What the Witness Said

The moment arose during testimony from Dr. Kirk Heilbrun, a forensic psychologist and the second witness to take the stand that day. Describing an April conversation with Clancy, Heilbrun explained that she had expected to be reunited with her children in heaven. He then referenced her Catholic upbringing and began questioning whether that expectation aligned with Catholic teaching, raising the subject of suicide as a mortal sin.

He never finished the thought. A defense objection cut him off, and Sullivan immediately summoned the attorneys for a sidebar. The jury was removed from the courtroom, and a short recess followed.

The Defense Pushes for a Mistrial

When proceedings resumed without the jury present, defense attorney Kevin Reddington argued the remark had crossed a clear line. He described the testimony as excessive and pointed out that this was not an isolated slip. Religion had surfaced once before during the trial, and that earlier exchange had already been struck from the record.

Reddington’s frustration centered on the combination of themes in the witness’s answer: faith, the afterlife, the deaths of the children, and the emotional weight all of that would carry with a jury weighing the fate of a mother accused of killing her own children.

The prosecutor responded that nothing about the comment was deliberate. She said she had not posed any question touching on religion and did not believe the witness intended to stir up emotion in the jury box.

The Judge’s Ruling and Warning

Sullivan declined to grant the mistrial, but he made his displeasure plain, criticizing the prosecution for allowing the testimony to reach the courtroom at all. Once jurors returned, he instructed them in firm terms that the comments carried no relevance to the case and were to be wiped from their consideration entirely.

He then released them for the day. The plan going forward, he indicated, is to resume Tuesday by finishing Heilbrun’s testimony, hearing from one additional witness, and then turning to the next phase of the trial.

Speaking outside the courthouse afterward, Reddington said he had raised his objection, the judge had ruled, and a forceful instruction had been issued. Under the law, he noted, jurors are presumed to follow such directions, and he said he was confident this jury would and was prepared to move forward.

Why Religion Is Treated as Off Limits

Legal analyst Jennifer Roman explained why a single reference to faith can trigger such a strong reaction from defense counsel. Questions probing a person’s religious beliefs, she said, touch directly on the constitutional separation between church and state. Unless a defendant’s faith carries specific, demonstrable relevance to the facts of a case, attorneys are ethically expected to steer clear of it entirely, because those beliefs have no bearing on guilt or innocence.

Heilbrun’s Account of Clancy’s Mental History

Before the disruption, Heilbrun, who has evaluated competency in roughly 330 cases, walked jurors through his assessment of Clancy’s psychological history. He interviewed her in April alongside another expert.

His account included several key points:

Clancy had a relatively thin mental health record prior to September 2022. She experienced performance-related anxiety as a high-achieving student and further anxiety connected to her three pregnancies.

Her condition worsened in mid-October, around the time she began taking Zoloft. Heilbrun described an almost immediate reaction that included depressive symptoms, severe insomnia, and heavy stress.

By late November and early December, she was troubled by disturbing intrusive thoughts about hurting herself, and eventually, at times, about harming her children.

Crucially for the prosecution’s theory, Heilbrun said Clancy did not describe auditory hallucinations. In his telling, she characterized these as her own thoughts rather than external voices. He also called it highly atypical that she reported hearing a voice in her head only on the night of the killings, with no similar experience before or afterward, describing that pattern as extremely unusual.

Heilbrun is scheduled to return to the stand to complete his testimony.

Cross-Examination of Dr. Avram Mack

Earlier in the day, Reddington concluded a tense cross-examination of psychiatrist Dr. Avram Mack, who appeared remotely by video. Mack had testified previously that during their April meeting at Tewksbury Hospital, Clancy recounted telling her children to go to God as she killed them at the family’s Duxbury home.

The exchange grew heated, with Reddington at one point sharply challenging the witness’s demeanor. He also raised a prior case in which, he said, a judge had found Mack unqualified to testify, a characterization Mack rejected.

Questioning turned repeatedly to postpartum psychosis. Mack has maintained that Clancy was depressed but not psychotic when the killings occurred. Asked whether he accepted postpartum psychosis as a genuine disorder, he responded that signs of psychosis at any point, and especially after childbirth, represent a legitimate clinical finding warranting concern and treatment.

The Larger Question Before the Jury

Mack is one of three rebuttal witnesses the prosecution is expected to call, standard procedure once an insanity defense has been presented.

The defense rested last week after its final witness, forensic psychiatrist Dr. Phillip Resnick, who previously played a prominent role in the Andrea Yates case. Resnick told jurors that Clancy described feeling an outside force seize control of her body before the deaths.

Outside the courthouse Monday morning, a group dressed in white gathered in memory of the three children, five-year-old Cora, three-year-old Dawson, and eight-month-old Callan.

Clancy has entered a not guilty plea to three counts of first-degree murder. Prosecutors contend the killings were planned and have questioned the seriousness of her suicide attempt. The defense maintains she cannot be held responsible, arguing she was overmedicated and in the grip of postpartum psychosis.

A first-degree murder conviction would mean life imprisonment with no chance of parole. A finding that she was not criminally responsible would instead send her to a state psychiatric facility in Massachusetts.

A Note on Support

If you or someone you know is struggling emotionally or facing thoughts of suicide, the 988 Suicide and Crisis Lifeline is available around the clock by call or text at 988, and offers online chat as well. The National Alliance on Mental Illness HelpLine can also provide guidance on mental health resources and support.