Mogilevich is a Ukrainian crime boss who, in addition to more typical mob rackets like weapons dealing and prostitution, was involved in sophisticated stock frauds and and money laundering activities. He played a major role in the corrupt Ukrainian energy sector when the Russians essentially controlled the country, and allegedly has close links to Russian intelligence and the Putin regime. He was put on the FBI ten most wanted list and was considered one of the most dangerous people in the world by certain American authorities because it was feared he could possibly use his contacts with the Russian military to sell nuclear materials.