TMDb/Marshals TV Discover the tragic fate of Monica Dutton in the Yellowstone spinoff Marshals. Learn how her death from cancer reshapes Kayce's journey as a single father. April 13, 2026 AceShowbiz - Marshals and its parent franchise Yellowstone have captivated audiences with their gripping blend of Western drama and intense family dynamics. A major storyline that has deeply affected fans is the tragic death of Monica Long Dutton, portrayed by Kelsey Asbille, which was revealed in the spinoff series Marshals.