The Minneapolis police officer whose tactics led to George Floyd’s death had a long record of complaints against him. So why was he still on patrol? Guest: Shaila Dewan, a national reporter covering criminal justice for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily  Background reading: Efforts to hold problem officers accountable often face resistance from unions, and juries are reluctant to second-guess police decisions.Violence escalated overnight in protests across the country, with police officers under fire in St. Louis and Las Vegas. Here are the latest updates.