weapons. Armed illegals stalked Border Patrol Mexicans were patrolling when agent was slain, indictment says Armed illegals stalked Border Patrol - Washington Times Five illegal immigrants armed with at least two AK-47 semi-automatic assault rifles were hunting for U.S. Border Patrol agents near a desert watering hole known as Mesquite Seep just north of the Arizona-Mexico border when a firefight erupted and one U.S. agent was killed, records show. A now-sealed federal grand jury indictment in the death of Border Patrol agent Brian A. Terry says the Mexican nationals were patrolling the rugged desert area of Peck Canyon at about 11:15 p.m. on Dec. 14 with the intent to intentionally and forcibly assault Border Patrol agents. At least two of the Mexicans carried their assault rifles at the ready position, one of several details about the attack showing that Mexican smugglers are becoming more aggressive on the U.S. side of the border. According to the indictment, the Mexicans were patrolling the area in single-file formation a dozen miles northwest of the border town of Nogales and in the darkness of the Arizona night opened fire on four Border Patrol agents after the agents identified themselves in Spanish as police officers. Two AK-47 assault rifles found at the scene came from the failed Fast and Furious operation.