The death of George Floyd, a black man who died on Memorial Day after he was pinned down by a white Minnesota police officer, has sparked outrage and protests in Minneapolis, across the United States and across the world.   Second-degree murder, third-degree murder and manslaughter charges have been filed against Derek Chauvin, the ex-officer who prosecutors say held his knee on Floyd's neck for nearly nine minutes. The three other officers have been charged with aiding and abetting se