She was a devoted mother. A physical therapist. A wife building a life in a quiet Massachusetts suburb. Then, in a single night, everything came apart.

This is the story behind the headlines the pressures that built for months before anyone noticed, the warning signs that went unread, and the courtroom battle that followed as prosecutors, defense attorneys, and mental health experts tried to answer the same impossible question: how does a mother's mind break, and who bears responsibility when it does?

Drawing on court records, expert testimony, and public reporting, this book traces the timeline that led to tragedy and the trial that has captivated and divided the public ever since. It's a story about postpartum mental illness, the limits of the systems meant to catch people before they fall, and a family shattered in ways that raise hard questions for anyone paying attention.

Read it to understand what happened. Read it to understand why.