
The story of one of the most notorious murders ever committed in a National Park. Follow Special Agent Beth Shott of the Investigative Services Branch (the elite detective force of the National Park Service) as she and her team doggedly pursue the suspect through three years of twists and turns until he is arrested and convicted.

Harold Henthorn calls 911 to report that his wife Toni has been gravely injured after falling off of a cliff on a remote trail. National Park Service Special Agent Beth Shott uncovers suspicious details and inconsistencies in Harold’s story.

As Special Agent Shott investigates the suspicious death of Harold’s wife Toni, anonymous letters and phone calls lead authorities to reopen an investigation into the death of Harold’s first wife 17 years earlier.