NEW BEDFORD, Mass. — A convicted sex offender pleaded guilty Monday to raping a 6-year-old boy at a Massachusetts public library last year while he was on probation. Corey Deen Saunders, 27, entered the plea Monday to child rape and related charges. He was arrested Jan. 30, 2008, after luring the boy to the magazine stacks in the New Bedford library while the child's mother worked on a computer just a few feet away. At a court hearing last year, prosecutors played a videotaped interview in which the boy told a child welfare official the assault was like being attacked...