She wrote a children's book to help her kids cope with losing their father.

She was the one who killed him.

In March 2023, Utah mom Kouri Richins published Are You With Me? — a tender picture book about a little boy searching for signs of his late father. She appeared on local television, soft-spoken and composed, talking about grief and healing and the power of a bedtime story.

One month later, she was arrested for murder.

This week on Plot Twist, we dig into one of the most disturbing true crime cases in recent memory — a story of fentanyl, financial ruin, a secret affair, and a children's book that may have been the most calculated move of all. We'll take you inside the marriage that was quietly falling apart, the investigation that took years to build, and the trial that left a courtroom speechless.

Thre ...