On a warm June night in Brandon, Manitoba, a 24-year-old woman named Cassity Delvenne got into a car. She was a fourth-year psychiatric nursing student, a single mother to a four-year-old girl, and someone’s whole world. That night set off a chain of events that no one could have imagined. Within minutes, police were called about a possible impaired driver, and by the time the night ended, Cassity was handcuffed, injured and facing charges of impaired driving and resisting arrest. Nine days later, she was dead. Her family is left with grief, rage and questions that no one seems able…

Think about how much of daily life depends on believing what we see and hear. A photograph from a family gathering, a voice on a voicemail, a video clip of a street argument—these are the small, ordinary documents of our lives. In a courtroom, however, they become something far heavier: evidence that can send someone to prison, take a child away from a parent, or destroy a reputation. For centuries, the legal system has treated such media as more reliable than memory, but also as something that can be challenged. Fake witnesses and false testimony have always existed, yet they…