A mother's mind before killings. Audio recording of missing mom. Plus, rap lyrics as evidence.

In Massachusetts, young mom Lindsay Clancy is on trial for allegedly murdering her three children. Her psychiatrist testifies about her mental state before killings. In California, Tyler McCain is accused of killing his wife, Nikki, who went missing in 2024 after filing a domestic violence report against him. In Dateline Round Up, former OnlyFans model Courtney Clenney pleads guilty to stabbing boyfriend. Update in the case of Luigi Mangione, alleged killer of UnitedHealthcare CEO Brian Thompson. Plus, prosecutors using rap lyrics and memoirs as evidence in court.