WANTED FUGITIVE • Victor Hugo Alegria-Salgado is not unusual among Mexican aliens who have a wife and children in both the U.S. and Mexico. Bigamy is illegal in Mexico but there is not much official interest there in the still-married women who have been financially abandoned by their husbands for greener grass up north. Alegria-Salgado is unusual in that he left his U.S.-located wife for the old one back in Mexico. He apparently was not satisfied with his Boulder, Colorado, family judging from his criminal abuse of his son. In fact Alegria-Salgado is believed to have fled to Mexico after throwing the 8-month-old across a room and fracturing some of the infant's bones. Is this what President Bush has in mind when he praises the "family values" of Mexicans?