Detective Chris Erb, who led the investigation into the murder of schoolteacher Christy Merak, and her brother Vince Merak, who fought tirelessly for justice, share gripping insights. They discuss the chilling aftermath of Christy's brutal murder and the emotional toll on her family. Unraveling the complexities of profiling and how modern DNA technology finally broke a decades-long case, they reveal the unexpected identification of a suspect whose ordinary life concealed dark secrets.