If youve never heard of Mogilevich then you havent been studying organised crime.
Here’s Der Spiegel hinting that he controls Gazprom’s partner RUE http://www.spiegel.de/international/spiegel/0,1518,394345,00.html
and here’s the FBI wanted poster [nb, they spell it without the “y”]: http://www.fbi.gov/wanted/alert/mogilevich_s.htm
He has his own Wikipedia entry: http://en.wikipedia.org/wiki/Semion_Mogilevich
and here’s a useful piece from the Village Voice:
http://www.villagevoice.com/news/9821,friedman,203,1.html

Its a pity he’s been arrested in Moscow, as the trial wont add to our knowledge, I suspect.