Jordan Smith discusses her research into the "BlueLeaks" archive of the leaked personal data of hundreds of thousands of cops and their cases. Smith was looking for evidence of unscientific techniques that the police use to elicit confessions and get convictions—and she found them in abundance. It turns out that the use of coercive interrogation techniques, discredited pseudoscience and phony forensic methods has become common practice in America's law enforcement agencies for decades. Smith works tirelessly to advocate for what should be acceptable to just about everyone: practices that are...