RAYMONDVILLE, Texas -- Two illegal immigrants from Mexico who were charged with first-degree murder in the shooting death of an off-duty U.S. Border Patrol agent in front of his family in Texas have been arrested and deported numerous times, police sources told FoxNews.com. One suspect has been arrested no fewer than four times for entering the U.S. illegally, according to federal court records. The other has been deported twice after entering the U.S. illegally, sources said. Gustavo Tijerina, 30, and Ismael Hernandez, 40, were arraigned Tuesday afternoon inside the Willacy County jail library. They were ordered held without bail after...