Experts Testify in Lindsay Clancy Trial Over Mental State

Published: August 25, 2026, 10:01 pm

The murder trial of Lindsay Clancy, the Massachusetts mother accused of killing her three children in January 2023, is nearing its conclusion with closing arguments expected on Thursday. The jury is anticipated to begin deliberations on Friday, following one final day of rebuttal testimony scheduled for this week. The central issue for the jury is determining whether Clancy was suffering from postpartum psychosis—a condition involving potential hallucinations, delusions, and mood swings—or if she understood the criminality of her actions at the time of the killings.

It is not disputed that Clancy strangled her three children: eight-month-old Callan, three-year-old Dawson, and five-year-old Cora. Following the act, she allegedly jumped from a second-floor window, resulting in permanent paralysis. Defense attorney Kevin Reddington has argued that Clancy was overmedicated and suffered from bipolar disorder in addition to postpartum psychosis, claiming she was compelled by a voice to commit the acts. In contrast, the prosecution bears the burden of proving that she did not suffer from a mental disease or defect that would have prevented her from understanding the wrongfulness of her conduct.

On Tuesday, prosecutors concluded their rebuttal case by calling forensic psychiatrist Gregory Saathoff, who is affiliated with the FBI and the University of Virginia. Saathoff challenged the defense’s narrative, noting that it was unusual for Clancy to report hearing voices only during the killings and for those voices to cease immediately afterward. He also highlighted several inconsistencies in her account of the events.

Earlier in the week, forensic psychologist Kirk Heilbrun, an expert hired by the prosecution, testified that he believed Clancy was criminally responsible. Heilbrun argued that she maintained an awareness of the illegality of her actions and that her behavior, including moving the children to the basement, appeared to be a series of deliberate decisions. During cross-examination, Heilbrun disclosed that he has been paid approximately $54,000 for his work on the case, though he admitted he lacked specific experience with postpartum mental health conditions. His testimony also included a controversial reference to Clancy’s Catholic faith, which led Judge William Sullivan to instruct the jury to disregard the comment.

The defense previously presented testimony from experts such as Dr. Phillip Resnick, a forensic psychiatrist who asserted that Clancy was clearly psychotic and not in control of her actions on the day of the killings. Psychologist Paul Zeizel, another defense witness, similarly concluded that Clancy had no appreciation for the wrongfulness of her acts. While it is documented that Clancy sought psychiatric treatment at McLean Hospital shortly before the incident, the trial has fundamentally rested on the conflicting expert interpretations of her mental state.

Judge Sullivan has urged the jurors to maintain an open mind until all evidence and closing arguments are evidence and closing arguments are presented. Resources for those in crisis include the 988 Suicide & Crisis Lifeline in the U.S., the Samaritans in the U.K. and Ireland on 116 123, and Lifeline in Australia on 13 11 14.

Photo: Collected