In August 2011, 21-year-old Katelyn Markham vanished just days before her birthday. Her fiancé, John Carter, called 911 to report her missing less than 24 hours after she was last seen. Instead of preparing for a celebration, Markham’s loved ones launched an urgent search—but found no trace of her. Over the next decade, investigators repeatedly questioned Carter, scrutinizing inconsistencies in his account as they worked to uncover the truth. This episode of Crimes of Passion, Sierra Gillespie takes a closer look at the evidence, the interviews, and the long road to answers.

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