Though forensic science is an established, indispensable crime-solving tool, there are times when forensic techniques fail to resolve a case to everyone's satisfaction. The 15 stories in this volume concern some vexing crimes in history - ones which could not be solved with forensic techniques. In some instances, shoddy lab work is to blame; in others, faulty evidence-collecting. From the still-contested death of Napoleon Bonaparte to the never-ending speculation that surrounds JFK's assassination, A Question of Evidence presents a wide range of contested cases that are still being fought over.