Lindsay Clancy’s high-profile murder trial ended in a mistrial on September 4 after jurors said they could not reach a unanimous decision following seven days of deliberations. The trial had lasted five weeks and included testimony from 85 witnesses and more than 300 exhibits. Judge William Sullivan moved to declare a mistrial after receiving the jury’s final note, but Clancy’s attorney, Kevin Reddington, made a last-minute attempt to delay the decision and appeal concerns about an apparent holdout juror to the Massachusetts Supreme Judicial Court. The defense argued that the juror was not properly applying the law and showed bias toward people with serious mental illness. That emergency appeal was unsuccessful, and Sullivan formally discharged the jury, thanking them for their commitment throughout the difficult case.

Clancy does not dispute that her three children—Cora, 5, Dawson, 3, and eight-month-old Callan—died by her actions on January 24, 2023, but she has pleaded not guilty to murder. Her defense maintains that she was suffering from postpartum psychosis and therefore could not be held criminally responsible, while prosecutors argued that her actions were intentional and calculated. The case has drawn national attention because of the competing arguments over mental illness, criminal responsibility, and Clancy’s psychiatric treatment before the tragedy. A status hearing is scheduled for September 29, when prosecutors and defense attorneys are expected to discuss what comes next following the mistrial.