In a region where the rule of law is shaky, the International Commission against Impunity in Guatemala (CICIG) has become something of a beacon. Now, an American-born financier has accused CICIG of taking money from the Russian government, and persuaded America’s Congress to hear his concerns. On April 27th a bicameral commission will hold a session entitled “The Long Arm of Injustice: Did a UN commission founded to fight corruption help the Kremlin destroy a Russian family?”