SAN DIEGO - The official inquiry of the October 24 incident in which U.S. Border Patrol agents were fired upon by what appeared to Mexican soldiers has been closed with no new light shed on why or how the incident occurred. Late yesterday, Border Patrol officials said there was no evidence that showed the agents were fired on and that Mexican soldiers crossed into the United States. William Veal, chief of the Border Patrol's San Diego sector, said the incident had the potential to be inflammatory but there was no proof showing it happened. "This could have been a very ...