In Lindsay Clancy’s Massachusetts murder trial, prosecutors argue that she killed her three children, while her defense says the deaths are linked to postpartum psychosis. Multiple reports frame the central issue as whether this mental health condition impaired Clancy’s judgment and perception around the time of the killings. Postpartum psychosis is described as a rare but serious psychiatric illness that can occur after childbirth and may involve symptoms such as delusions, hallucinations, severe confusion, and erratic behavior. It is presented in coverage as a medical emergency that can escalate quickly and typically requires urgent evaluation and treatment. CBS reports also include expert discussion from a psychiatrist about the postpartum psychosis defense, emphasizing how the diagnosis can affect a defendant’s mental state at the time of the alleged offenses. Across the accounts, the core point is that the defense seeks to connect Clancy’s actions to postpartum psychosis, while the trial determines whether that explanation is supported by evidence and how it applies to legal responsibility.