Ritu Roy, a constable with an all-female United Nations peacekeeping unit in Darfur, Sudan, has been shot dead. Her superiors call it a random shooting. Her best friend thinks otherwise. She s found a bullet casing from a sniper s rifle, an uncommon weapon in the refugee camp. The case remains closed until Valentin Vermeulen arrives to conduct a routine audit. As an investigator with the UN Office of Internal Oversight Services, his job is to ferret...