A Switch Is Flipped, and Justice Listens In - New York Times

Nearly 20 years ago, the introduction of DNA testing transformed the investigation of crimes that involved human tissue — blood, semen, saliva, skin — by introducing a level of precision that human memory and witness could never provide. Now, digital technology has brought a second wave of transformation, offering new precision about what people did or said, regardless of whether they spilled blood in the process, or how the actions are portrayed in news accounts or in official statements.