Nataliya Magnitskaya (L), mother of Sergei Magnitsky, grieves over her son 's body during his funeral at a cemetery in Moscow November 20, 2009. Magnitsky, a suspect in a tax evasion case against Hermitage, once Russia's biggest investment fund, died of heart failure in prison on Monday, state prosecutors said. REUTERS/Mikhail Voskresensky (RUSSIA CRIME LAW POLITICS)