When a bank robbery witness provided an almost impossibly detailed account — license plates, clothing fiber colors, the exact time on a stopped clock — investigators initially celebrated. But as her memories grew more precise with every interview, a cognitive scientist became convinced something was deeply wrong, and that an innocent man was already three months into a wrongful conviction. Tonight, we examine the dark science of memory conformity, the legal system's dangerous reverence for certainty, and what happens when the most compelling witness in the room is also the most unreliable.