Semion Yudkovich Mogilevich is a Ukrainian-born Russian organized crime boss. He is described by agencies in the European Union and United States as the "boss of all bosses" of most Russian Mafia syndicates in the world, he is believed to direct a multi billion-dollar international criminal empire and is described by the Federal Bureau of Investigation as "the most powerful and dangerous gangster in the world," with immense power and reach at a global scale, and connections to prominent government, military, and law enforcement officials, and powerful politicians around the world. From Wikipedia
