Lindsay Clancy Trial: Prosecution’s Own Expert Testifies to Months of Warning Signs
Dr. Kirk Heilbrun, a forensic psychologist called as a prosecution rebuttal witness, spent an ho on the stand laying out a timeline that doesn’t do the prosecution any favors in the murder trial of Lindsay Clancy — the Duxbury, Massachusetts mother accused of strangling her three children, 5-year-old Cora, 3-year-old Dawson, and 7-month-old Callan, with exercise resistance bands inside the family’s Summer Street home on January 24, 2023. Clancy faces three counts of murder and three counts of strangulation, has pleaded not guilty, and is mounting an insanity defense centered on severe postpartum psychosis and psychiatric overmedication.
Heilbrun opened by explaining retention bias — the tendency to lean toward whichever side hired you for the evaluation — before detailing his own work: roughly 180 hours reviewing police records, medical records, court documents, and surveillance footage, plus 10.5 hours testing and interviewing Clancy and 1.5 hours in collateral interviews. He testifie
