When celebrity dog trainer Mark Stover mysteriously vanished, authorities were left with many unanswered questions. Soon into their investigation, they unearthed a dark love triangle, with Mark placed squarely in the middle.

So what transpired on the morning of October 28, 2009, that left one man dead and another claiming self-defense? And more importantly, was Mark Stover the hunter or the hunted?

Listen in as Peter Van Sant sits down with journalist Maggie Freleng and the two go behind the scenes of "Trained to Kill: The Dog Trainer, The Heiress and the Bodyguard," a culmination of Peter’s years-long investigation into this twisty case.

From Tenderfoot TV - new episodes of "Up and Vanished Weekly" with Maggie Freleng and Payne Lindsey release every Wednesday on all listening platforms.

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Mark Stover’s body was still missing when the trial over his death began. Michiel Oakes said the body would prove his innocence, and that he would reveal everything when he took the stand.

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Detectives compare how the evidence found at Mark Stover’s house measures up to Michiel Oakes’ version of events. They discovered cell phone records, witnesses, and surveillance video that painted a more premeditated picture.

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Michiel Oakes said he tried to negotiate with Mark Stover to end the vicious back and forth. But the way he told the story, everything went wrong during their final meeting, on October 28th, 2009. The day Mark disappeared and the day Michiel was pulled over by police.

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After police got an anonymous tip that Mark Stover was transporting drugs, he became paranoid that Linda Opdycke was out to get him. In a battle between exes, each side claimed the other was escalating the situation to a deadly point of no return. That’s when Linda’s new boyfriend Michiel Oakes said Mark found a new target.

Get early, ad-free access to episodes of Trained to Kill: The Dog Trainer, the Heiress and the Bodyguard by subscribing to 48 Hours Plus on Apple Podcasts. The series is widely available everywhere else you get your podcasts.

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Linda Opdycke fled her family’s property and lived on the run, determined to separate from her husband Mark Stover. In her efforts to defend herself against what she called his relentless stalking and harassment, Linda met a former security expert who thought he could help her deal with her ex.

Get early, ad-free access to episodes of Trained to Kill: The Dog Trainer, the Heiress and the Bodyguard by subscribing to 48 Hours Plus on Apple Podcasts. The series is widely available everywhere else you get your podcasts.

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Mark Stover trained the dogs of the rich and famous. When Linda Opdycke, the daughter of a multi-millionaire, hired him to train her new attack dog, they started combining business and pleasure. Their partnership lasted for more than a decade before disputes between the two ripped their lives apart.

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When celebrity dog trainer Mark Stover disappeared from his home in Washington State, leaving behind a scene covered in blood, no one knew if Mark was the victim or the perpetrator. As detectives unraveled the clues, they discovered a twisted story fueled by a love triangle between Mark, his heiress ex-wife, and her new boyfriend. Was Mark the hunter, or the hunted?

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How to make sense of this incomprehensible tragedy? Detective Brian Byerson has been in touch with Ashley Hargan weekly since her mother and sister were killed. She not only testified at trial; she made some dramatic moves after she discovered the truth.

Get ad-free access to episodes of Blood is Thicker: The Hargan Family Killings by subscribing to 48 Hours Plus on Apple Podcasts. The series is widely available everywhere else you get your podcasts.

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Detectives finally arrest a suspect in the Hargan family murders. But at trial, defense attorneys argue a new theory for how the killings might have happened. And that theory might cast enough doubt to throw the entire trial into question.

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