I never thought I’d end up in handcuffs and a jail cell for something I didn’t say. But last May, police in New Haven, Conn., arrested me — because a parking attendant falsely claimed I had used a racial slur against him nearly a year earlier. I denied it. I asked the cops to check the parking lot’s surveillance video. They didn’t — and the state charged me first with disorderly conduct, then with three counts of breach of peace in the second degree. It took almost a year, tens of thousands of dollars in legal fees and endless stress...