For days, protesters gathered outside the heavily guarded South Los Angeles sheriff’s station in tense but largely peaceful demonstrations to decry the deputies who shot and killed Dijon Kizzee last week in the nearby neighborhood of Westmont. But over the Labor Day weekend, those demonstrations escalated to clashes, with deputies firing projectiles and tear gas at the crowds and arresting 35 people over four nights of unrest. The Sheriff’s Department said protesters initiated the confrontations by throwing rocks and bottles at deputies. But activists said in interviews that the displays of force were unprovoked. There were plenty of weird situations...