The murder trial of a Massachusetts mother accused of killing her three children collapsed after one juror refused to convict, leaving a retrial decision in the hands of prosecutors and reigniting a bitter national argument over postpartum psychosis as a defense.

• Eleven of twelve jurors sided with Clancy; one man held out, forcing a mistrial after seven days of deliberation.
• The district attorney must now decide whether to retry the case, reduce the charges, offer a plea, or drop it; legal watchers expect a retrial, pointing to the Karen Read case that ended in acquittal after a hung jury.
• Expert witnesses testified they saw no sign of psychosis, calling it very unusual that she heard a voice only during the short window in which the children were killed and never again.
• Critics point to men who killed their own children — Timothy Jones, John Battaglia — and got death sentences despite mental illness claims, arguing the standard shifts by gender.
• The case has become a social dividing line, with a fundraiser for Clancy topping a million dollars while others treat support for her as a reason to cut people off.

Outlook: Clancy stays held at a state hospital while prosecutors weigh a second trial, and whatever they decide will shape how courts handle postpartum mental illness defenses.