Prosecutors Question Faith of Lindsay Clancy’s Mother-in-Law in Murder Trial Strategy

Prosecutors employed religious doctrine as a trial tactic Tuesday, questioning Lindsay Clancy’s Catholic mother-in-law about whether she understood murder constitutes a mortal sin. The line of questioning aimed to establish that Clancy possessed full awareness of her actions when she killed her three young children, directly contradicting the defense’s assertion that severe postpartum psychosis rendered her incapable of comprehending her conduct.

Clancy, 36, faces three counts of first-degree murder in the May 2023 deaths of her children—Cora, Dawson, and Callan, all younger than 6—whose bodies were discovered strangled in their family’s Duxbury home. Assistant District Attorney Shanan Buckingham posed the faith-based inquiry to Susan Clancy during prosecution testimony that concluded Monday morning.

The witness declined to respond directly to the morality question. Judge William Sullivan immediately halted the exchange, convening a sidebar conference and striking the remark from the official trial record.

Susan Clancy testified that she observed troubling changes in Lindsay’s mental state during the final months of 2022, while maintaining that her daughter-in-law remained an exceptionally caring parent. She recalled Lindsay reaching out in November 2022 describing severe insomnia, appetite loss, anxiety, and depression, with the defendant explicitly requesting assistance.

Lindsay’s mother, Paula Musgrove, corroborated these mental health concerns through trial testimony, referencing an October 2022 text message in which her daughter pleaded for support and expressed distress about her deteriorating condition. Musgrove stated she harbored no apprehension regarding the children’s welfare at that time.

The defense case resumes Wednesday as attorneys work to persuade jurors that Clancy experienced acute postpartum psychosis during the alleged crimes.