A warning to listeners and viewers: The following stories contain graphic images and sounds of police violence. In Austin, Texas, city councilors voted unanimously Thursday to ban the use of tear gas and to restrict the use of rubber-coated bullets, bean bag rounds and pepper spray. The vote came after councilmembers heard two days of harrowing public testimony about recent police attacks on protesters that left 31 people hospitalized — two of them with serious head injuries. The Austin City Council also voted Thursday to reinvest some police department funds in other agencies and to limit the use of police deadly force.