“Last July, Gavin Long, a black, 29-year-old former Marine, ambushed police in Baton Rouge, Louisiana, killing three officers and wounding three more before being killed. Now one of the wounded, who was rendered permanently disabled in the shooting, has filed a federal lawsuit against the Black Lives Matter movement and activists including DeRay Mckesson and Johnetta Elzie, whom he blames for inciting the attack.”