It begins with an astonishing request from a thirteen-year-old prospective client.  Allegra Gardner’s sister Fiona was murdered six years ago.  It seemed like an open-and-shut case: the accused, Lonnie Stall, was seen fleeing the scene; his blood was on Fiona and her blood was on him; most damningly, Lonnie Stall pleaded guilty.  But Allegra believes(…)