Peter Van Sant of 48 Hours fame broke down why the story of Mark Stover motivated him to revisit the case in his new podcast series, Trained to Kill. A famed dog trainer from humble beginnings, Mark Stover's disappearance in October 2009 led to suspicion of foul play. Things only got more complicated as the case went on, with his ex-wife (and wealthy heiress) Linda Opdycke and her new romantic partner Michael Oakes steadily revealing more and more damning details about their roles in the murder of Mark Stover.