But I am not afraid , '' he said in a press conference in Moscow . Mikhail Prokhorov concedes he runs the risk of ending up in prison . The New Jersey casino owner is worth $ 1 billion . Friends of Russian Prime Minister Vladimir Putin march to back him . Hundreds of people demonstrate against parliamentary election results on Saturday .
Mikhail Prokhorov concedes he runs the risk of ending up in prison . The New Jersey casino owner is worth $ 1 billion . Friends of Russian Prime Minister Vladimir Putin march to back him . Hundreds of people demonstrate against parliamentary election results on Saturday .