The New York Times has introduced a documentary audio series that follows Rukmini Callimachi, who covers terrorism for The Times, on her quest to understand ISIS. Today, as a special episode of \u201cThe Daily,\u201d we offer the last chapter of \u201cCaliphate.\u201d Rukmini asks: What does the future hold for the ISIS returnee who confessed to murder? And what does he believe now?\n\nFor more information about the series, visit nytimes.com/caliphate.\n\nThis episode includes disturbing language and scenes of graphic violence.