At 12.35 a.m. on 5 July, the night after Independence Day, police in Baton Rouge accosted 37-year-old Alton Sterling who was selling CDs in front of the Triple S Food Mart, a convenience store in a poor neighbourhood. Mobile phone footage, taken by members of an organisation that monitors police violence against civilians, shows two police officers pinning Sterling down and shooting him at point-blank range, multiple times. We see Sterling’s blood spread rapidly across his red shirt. We see a man die.