In 2010, 17-year-old Mackenzie Cowell was living every overachiever’s dream — juggling high school, beauty school, and a future that looked picture-perfect. But one ordinary afternoon, she vanished. Four days later, her body was discovered by the Columbia River, and the small Washington town she called home was shaken to its core. What really happened inside that beauty school? Was Mackenzie killed by someone she trusted — maybe even one of her classmates? Or did the police rush to judgment in their search for a suspect? In this episode, we’re breaking down the tangled web of evidence, false confessions, and unanswered questions behind one of the most haunting cases of the 2010s.