An interview takes a shocking turn — and answers a key question. See omnystudio.com/listener for privacy information.

Alone in the woods, at the 4Runner spot, this is what you hear. See omnystudio.com/listener for privacy information.

Jon exposes Robert's likeliest accomplice. See omnystudio.com/listener for privacy information.

A hermit. A mistress. A convict. Someone knows something. See omnystudio.com/listener for privacy information.

A fugitive who hid in Arizona for 28 years shares his story. See omnystudio.com/listener for privacy information.

Jon finds key photos — and interviews A.I. "Robert." See omnystudio.com/listener for privacy information.

A unified theory on Robert's plan — and fate. See omnystudio.com/listener for privacy information.

Jon reveals what likely triggered the murders. See omnystudio.com/listener for privacy information.

Robert loses control and spirals into a violent decline. See omnystudio.com/listener for privacy information.

Experts — and famous family slayings — offer clues. See omnystudio.com/listener for privacy information.

Jon offers $5K for missing items — including Robert's gun. See omnystudio.com/listener for privacy information.

We explore underground caves in Arizona. See omnystudio.com/listener for privacy information.

Robert's friend Ashley speaks for the first time. See omnystudio.com/listener for privacy information.

Robert Fisher is nowhere, everywhere, all at once. See omnystudio.com/listener for privacy information.

Years fly by. Myths solidify. Time to bust them. See omnystudio.com/listener for privacy information.

We examine forensic evidence and alternate suspects. See omnystudio.com/listener for privacy information.

A house explodes. Police find three bodies. A father disappears. See omnystudio.com/listener for privacy information.

Arizona's governor can fund a $10K reward — if she wants. See omnystudio.com/listener for privacy information.

Jon offers a new reward. See omnystudio.com/listener for privacy information.

Here's how to reach us. See omnystudio.com/listener for privacy information.

Disaster looms as the Fisher family’s final hours wind down. See omnystudio.com/listener for privacy information.

In 2001, Robert Fisher killed his family, blew up their suburban home, and vanished in a remote Arizona forest. Did he die — or escape? See omnystudio.com/listener for privacy information.