First: A short “introduction” from Wikipedia: Semion Yudkovich Mogilevich (June 30, 1946 in Kiev, Ukraine, in Russian Семен Могилевич, also written as Semyon) is a notorious organized crime boss who is believed to control the largest Russian Mafia syndicate in the world. His business activities are alleged to include arms dealing, drug trafficking, prostitution and money laundering. He is nicknamed "The Brainy Don", because of his business abilities and because he holds a degree in Economics from the Lviv University.
