The murder case against former Massachusetts labor and delivery nurse Lindsay Clancy remains unresolved after a jury deadlocked following nearly six weeks of trial proceedings.
Clancy is charged with three counts of first-degree murder in the January 24, 2023, deaths of her children, Cora, 5, Dawson, 3, and Callan, 8 months, at the family’s Duxbury home. She has admitted killing the children but pleaded not guilty by reason of lack of criminal responsibility.
The central issue at trial was Clancy’s mental state. Her defense argued that she was experiencing postpartum psychosis and severe psychiatric symptoms that affected her ability to understand the nature or wrongfulness of her actions. Prosecutors challenged that account and argued that the killings were deliberate and that Clancy remained legally responsible. The case became a major focus of discussion surrounding postpartum mental health and the legal standards governing criminal responsibility.
Clancy had received psychiatric treatment before the killings, and testimony during the trial examined her symptoms, medications and interactions with healthcare providers. Her former husband, Patrick Clancy, also testified about changes he observed in her mental health.
After about seven days of deliberations, the 12-member jury could not reach the unanimous decision required. Judge William Sullivan declared a mistrial on September 4, 2026. Reports indicated the jury was divided 11-1, although no verdict was entered.
Clancy remains charged, and the case has been scheduled for a September 29 court hearing. Prosecutors must determine how to proceed, while the defense has indicated it intends to pursue further legal arguments.
The mistrial leaves the legal questions surrounding Clancy’s criminal responsibility open.