A forensic psychologist testified Tuesday that Lindsay Clancy stated she heard a "male voice" commanding her to kill her three children and then kill herself, according to testimony at her murder trial.

Lindsay Clancy, 36, faces three counts of first-degree murder in connection with the deaths of her children—Cora, Dawson, and Callan—all younger than 6, who were found strangled in their Duxbury, Massachusetts, home in 2023. The prosecution concluded its case Monday morning.

Dr. Paul Zeizel, a clinical and forensic psychologist, testified that after Clancy allegedly killed her children, she told her then-husband, Patrick Clancy, that she heard a voice instructing her to do so. Zeizel met with Clancy in the hospital after the alleged killings.

"She had told Patrick that she loved him very much. She was unable to express a lot of emotion, but she expressed love for him, and she had said that she heard a male voice ordering her, telling her that she didn't have any choice. But she had to kill her children and then kill herself," Zeizel testified.

When asked by Clancy's defense attorney, Kevin Reddington, if Clancy was faking her symptoms, Zeizel stated, "She was not faking. There was no evidence of any malingering. She presented as an honest citizen."

Susan Clancy, Lindsay Clancy's mother-in-law, testified on Tuesday that she had concerns about Lindsay's mental health during the 2022 holiday season but described her as a "wonderful mother." Susan Clancy said Lindsay "was struggling" and "begging for help."

The defense began presenting its case Wednesday morning, contending that Clancy was experiencing postpartum psychosis at the time of the children's deaths. Reddington obtained a court order permitting him to speak with Clancy in the hospital following the alleged killings.