Psychiatrist Who Clashed With Lindsay Clancy’s Lawyer Resigns From Hospital as Jury Deliberates

Lindsay Clancy, 32, strangled her daughter Cora, five, and son Dawson, three, 8 month old son Callan to death.Facebook / Lindsay Marie Clancy

A psychiatrist who became one of the prosecution’s most closely scrutinized witnesses in Lindsay Clancy’s murder trial has resigned from his position at Nemours Children’s Health, a development confirmed as jurors continue weighing whether Clancy should be held criminally responsible for the deaths of her three children.

Dr. Avram Mack, who testified for the prosecution and became involved in several tense exchanges with defense attorney Kevin Reddington, resigned from the Delaware-based health system on Monday, Aug. 24 — the same day he completed his testimony remotely. Nemours confirmed Friday that Mack was no longer employed there but declined to explain the circumstances, citing the confidentiality of personnel matters.

Mack could not be reached for comment, and there is currently no publicly confirmed evidence that his departure was caused by his testimony in the Clancy case.

Mack emerged as a key prosecution witness

Lindsay Clancy, 32, strangled her daughter Cora, 5, and sons Dawson, 3, and Callan, 8 months..Facebook / Lindsay Marie Clancy

Mack testified as a prosecution rebuttal witness as the state challenged the defense’s central argument that Clancy was experiencing postpartum psychosis when she killed her children — Cora, 5, Dawson, 3, and Callan, 8 months — at the family’s Duxbury, Massachusetts, home on Jan. 24, 2023.

The psychiatrist acknowledged that Clancy had been in a serious psychiatric state and was suffering at the time. But he ultimately concluded that she retained the ability to understand right from wrong and should therefore be considered criminally responsible.

That conclusion put Mack directly at odds with the defense.

Clancy’s attorneys have argued that severe mental illness deprived her of criminal responsibility. Defense psychiatrist Dr. Phillip Resnick testified that Clancy was psychotic and may have been experiencing command hallucinations. Mack, by contrast, said his evaluation did not support the conclusion that she was psychotic at the time of the killings.

Mack did not evaluate Clancy until April 2026, more than three years after the deaths.

Cross-examination turns confrontational

Lindsay Clancy watches jurors as they enter the courtroom to start their second day of deliberations at Plymouth Superior Court in Plymouth, Mass., on Friday, Aug. 28, 2026.Greg Derr/The Patriot Ledger

Mack first testified in court on Friday, Aug. 21, before continuing his testimony remotely on Monday.

During cross-examination, Reddington repeatedly challenged his conclusions, his experience treating adults and his understanding of postpartum psychiatric conditions.

The exchanges became increasingly tense.

At one point, Reddington reacted after believing Mack was smiling during questioning, telling him that the subject under discussion was not funny. The judge intervened multiple times during the contentious examination.

Reddington also pressed Mack over whether Clancy had been experiencing psychosis. Mack maintained that he had not found evidence in the available records supporting psychotic features.

The dispute went to the heart of the trial: Clancy’s mental illness itself is not seriously contested, but the prosecution and defense sharply disagree over whether it prevented her from understanding the wrongfulness of her actions or controlling her behavior.

Mack resigned the same day

Hours after his Monday testimony, Mack resigned from Nemours Children’s Health, according to the health system.

A Nemours spokesperson confirmed that his resignation was effective Aug. 24. By Friday, Mack was also no longer listed on the organization’s website.

Nemours has not disclosed why he resigned.

That distinction is significant. Although the timing has attracted attention because it coincided with Mack’s highly publicized testimony, neither Nemours nor Mack has publicly connected his departure to the Clancy trial.

Reports that Mack was simply “fired” therefore go beyond what has been confirmed. Available reporting indicates that he resigned.

When Reddington was asked Friday whether he knew anything about Mack’s employment status, he reportedly shook his head to indicate that he did not.

Jury still considering Clancy’s fate

News of Mack’s resignation emerged while the 12-member jury was deliberating Clancy’s case.

Jurors completed their second day Friday without reaching a verdict. They have spent roughly 10 hours deliberating and are scheduled to return Monday morning.

During deliberations, the jury made a notable request to examine prescription medication bottles entered into evidence as well as the knife associated with Clancy’s suicide attempt after the children were killed.

The request does not reveal how jurors are leaning, but it comes after weeks of testimony focused heavily on Clancy’s psychiatric treatment, medications and mental condition.

Clancy, now 36, does not dispute that she killed her three children. Instead, her defense is asking jurors to find that she lacked criminal responsibility because of severe mental illness.

Prosecutors acknowledge that Clancy experienced serious psychiatric problems but argue that she nevertheless understood what she was doing and knew it was wrong. Mack’s testimony was an important part of their effort to support that position.

If convicted of first-degree murder, Clancy could face life imprisonment without parole. A finding that she was not criminally responsible because of mental illness would instead lead to psychiatric commitment, with any eventual release subject to further legal and medical review.

For now, the reason behind Mack’s sudden resignation remains undisclosed — while the jury prepares to return Monday and continue deliberating the central question that divided the psychiatric experts throughout the trial.