About a dozen people showed up at St. Vincent Catholic Church in South Los Angeles to console Luis Angel Garcia's mother, view the tiny casket holding her baby and hear the funeral Mass. It took only two pallbearers to carry the casket at the end of the 30-minute service. But Luis' death has reverberated throughout Los Angeles as city officials and residents try to make sense of how a 23-day-old baby could be a victim of gang violence. Mayor Antonio Villaraigosa said the slaying and its causes were a "top priority," and the Los Angeles Police Department initially devoted...