Judge Denies Mistrial in Lindsay Clancy Murder Case

A Massachusetts judge on Monday denied a defense motion for a mistrial in the trial of Lindsay Clancy, who faces three counts of first-degree murder for strangling her young children in January 2023 at their Duxbury home.

Defense attorney Kevin Reddington requested the mistrial after prosecution forensic psychologist Kirk Heilbrun brought up Clancy's Catholic background and the concept of suicide as a mortal sin during testimony in Plymouth Superior Court.

Judge William Sullivan rejected the request, ordered references to mortal sin and Catholic teachings stricken from the record, and instructed jurors to disregard the statements before sending them home for the day.

"I am not going to declare a mistrial at this time," said Sullivan.

Reddington accused prosecutors of intentional misconduct, emphasizing that religion had been improperly raised previously when prosecutors asked Clancy's former mother-in-law if she knew murder was considered a mortal sin.

"It's the same thing again: talking about religion, talking about heaven, talking about killing people and the impact or the effect that it would have on Lindsay, as well as her children," said Reddington.

Prosecutors pushed back against the defense claims, stating that the inquiry was not aimed at causing prejudice and was meant to provide context for the mental health evaluation.

"There was no intentional conduct by the Commonwealth," said Sprague. "That was not where I intended to go with this questioning, and I don't think that the witness intended to do any harm either, he was just explaining his rationale."

Following the hearing, Sullivan repeated his admonition to the jury, calling the line of questioning an inappropriate area of inquiry and stating that Heilbrun's understanding of Catholic dogma was irrelevant.

Heilbrun testified that Clancy had experienced intrusive suicidal thoughts for months before the killings and believed her children would suffer without her, rejecting defense claims that she acted due to command hallucinations.

"She only experienced it for the 18 minutes or so that it took to kill the children," said Heilbrun. "And to put it mildly, that would be a very, very unusual pattern or manifestation of how this kind of thing comes about."

Clancy has pleaded not guilty, claiming postpartum psychosis rendered her not criminally responsible for the deaths of 5-year-old Cora, 3-year-old Dawson, and 8-month-old Callan. The trial resumes Tuesday, with closing arguments expected on Wednesday.