She is just seventeen. An African-American high-school student. If Darnella Frazier had not turned on her cellphone on May 25, when she witnessed four police officers arresting a black man in Minneapolis, the world would never have known how George Floyd died that day, or why. A convenience store employee had called the police, accusing Mr Floyd of buying cigarettes with a fake $20 bill. Possibly Mr Floyd resisted arrest, which did not result in a “medical incident” as the police in ...