A Mexican illegal immigrant once embraced by Minnesotans as a deserving charity case pleaded guilty today to breaking and entering in Boston. Francisco Javier Serrano's plea means his strange American odyssey will end where it began: He will be deported to Mexico. Serrano, 22, was found last year living inside a Minneapolis high school, his tale of struggle and homelessness galvanizing locals as news of his plight spread. News accounts dubbed him the "Apple Valley High squatter," and Serrano told his newfound friends that he sought to attend a US college and become an inventor. Soon, he had a rent-free...