Kyron Horman vanished nine years ago without a trace after his school science fair. His parents say they believe his stepmother, Terri, knows what happened to him. Terri denies any wrongdoing. On this week’s episode 3 of Into Thin Air: The Mysterious Disappearance of Kyron Horman, “Mystery and Murder: Analysis By Dr. Phil,” Dr. Phil reviews Terri Horman’s Facebook post that caused more speculation just four days after 7-year-old Kyron disappeared. Plus, what happened during her third polygraph exam? See omnystudio.com/policies/listener for privacy information.

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