Sumário:King between the lines : what it means for arrestee DNA typing. Judicial findings of probable cause. The seriousness of the offense. Automatic expungement -- King and the double helix : the DNA cases to come. Myth : King matters only to criminals. Myth : police will not, and legally cannot, test for any kind of sensitive information. Myth : arrestee sampling is necessary to solve a lot of crime -- King and the fourth amendment : the rise of reasonableness. The fallacy of "discretionless" group surveillance. The truth machine. The infallibility of Big Data.