The Supreme Court ruled in a 5-4 decision Monday that police may take a DNA swab from people arrested for crimes without first getting a warrant to do so. In an unusual twist, the court's conservative firebrand, Antonin Scalia, joined three of his liberal colleagues in a scathing dissent that warns the court's decision paves the way for the creation of an invasive police state. Scalia called the decision's scope "vast" and "scary," and said the DNA collection is an unequivocal violation of Americans' Fourth Amendment right to be free from "unreasonable searches and seizures" of their bodies and homes....