In 1974, a revolutionary group held up the Old Shawmut Bank in Boston's Audubon Circle. Money was stolen. And a woman named Emily Gordon, a visitor in town cashing traveller's checks, was shot and killed. No one saw who shot her. Despite security-camera photos and a letter from the group claiming responsibility, the perpetrators have remained at large for nearly three decades. Enter Paul Giacomin, the closest thing to a son Spenser has. Twice before, Spenser's come to the young man's assistance;