John Hartenfeld’s Cold Case and His Son’s Long Search for Truth

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In August 1996, John Hartenfeld drove into the mountains of northern New Mexico for a solo fly fishing trip and never came home. His Toyota 4-Runner was found two months later on remote ranch land — every fingerprint wiped from the vehicle. His credit card had already been used, four days after he vanished, to buy a small and troubling amount of two-stroke fuel. Private investigators and law enforcement both concluded foul play. No one was ever prosecuted.

John's son James Hartenfeld is a Portland comedian who has spent most of his adult life with this unresolved wound. He joins us to talk about the moment as a kid when he searched under beds and in closets hoping his dad was pranking him, about the phone call his dad made to a close friend reporting that someone was messing with his car — days before he disappeared — and about a jaw-dropping development that happened just weeks before this recording: New Mexico cold case investigators found remains in the area where John vanished, and they need James's DNA.

James is also building My Little Cold Case, a six-episode documentary series about his father's disappearance. It's a project designed for the families that most cold case content ignores — the ones with no ending, no arrest, no resolution. Just a missing person and a family still waiting.

• The last confirmed sighting of John Hartenfeld and the fishing trip that never ended
• The credit card charge investigators believe may have been used to purchase fuel for dismemberment equipment
• John's final phone call to his friend Muggsy: "Someone's messing with my car"
• A wiped-down truck, refused polygraphs, and a case that went cold
• The tensions investigators cited as the most likely motive — and why they're hard to talk about
• DNA samples collected in 1996 that have never been tested
• The brand-new development: recently found remains and a pending DNA test
• What it's like to grow up, build a career, and still carry an unanswered question
• Why James built My Little Cold Case — and who it's really for

Links from this episode

mylittlecoldcase.com — follow the project and support James's documentary series

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