Just hours after it became known that the accused killer of a Houston police officer was an illegal Mexican immigrant, top city officials braced themselves for another round of criticism of the city's policies toward illegal immigrants. Houston police officer Rodney Johnson was shot four times in the head during a traffic stop last week. Investigators say Juan Leonardo Quintero, a Mexican national living in the United States illegally has confessed to killing Johnson, a father of five. Quintero had been deported once and crossed the border illegally again. U.S. Rep John Culberson, R-Houston, reminded the public Monday of his...