
Scientists are accustomed to a landscape of shifting knowledge, while the justice system prizes certainty. But the criminal justice system, including forensic science, increasingly has been called upon to re-examine past certainties and to revisit what they once believed to be incontrovertible facts. Take “comparative bullet lead analysis,” a technique used since John F. Kennedy’s 1963 assassination that “matches” a bullet or bullet fragments to a box or batch of ammunition manufactured at a specific time and place. The chemical analysis behind it hinged on what proved to be a ... Read More






