16. An Answer
An interview takes a shocking turn — and answers a key question.
Ambient: 4Runner Spot
Alone in the woods, at the 4Runner spot, this is what you hear.
15. The Accomplice?
Jon exposes Robert's likeliest accomplice.
14. Persons of Interest
A hermit. A mistress. A convict. Someone knows something.
13. "Gary"
A fugitive who hid in Arizona for 28 years shares his story.
12. Manhunt!
Jon finds key photos — and interviews A.I. "Robert."
11. Jon's Theory (Part 2)
A unified theory on Robert's plan — and fate.
10. Jon's Theory (Part 1)
Jon reveals what likely triggered the murders.
9. The Descent
Robert loses control and spirals into a violent decline.
8. Annihilation
Experts — and famous family slayings — offer clues.