The Lindsay Clancy trial ended in mistrial after jurors deadlocked over whether postpartum psychosis made her unable to control her actions when she killed her three children. WBUR's Deborah Becker explains the competing medical and legal arguments, the jury's inability to reach unanimity, and what the case reveals about inadequate maternal mental health care in America. Postpartum psychosis, affecting one to two of every 1,000 births, is often misdiagnosed because symptoms can include quiet behavioral changes rather than obvious hallucinations, making early intervention critical.