A general view of the 28th tax inspectorate in Moscow March 1, 2012. The 28th tax inspectorate was at the centre of the most notorious recent alleged fraud involving Russian officials: the case of investment fund Hermitage Capital. London-based Hermitage, once the largest foreign portfolio investor in Russia, alleges that dozens of Russian officials were involved in an operation in 2007 to seize its company seals and file a fraudulent tax rebate for $230 million. Hermitage's lawyer, Sergei Magnitsky, investigated the case and was arrested in late 2008 by the Interior Ministry officials he suspected of the alleged fraud. He was pressured while in detention to confess that he had stolen the money, says Hermitage. Magnitsky's health deteriorated and, despite repeated requests, he was denied treatment for abdominal pains, diagnosed as pancreatitis, cholecystitis and gallstones requiring surgery, according to Hermitage. He died in November 2009, aged 37, after what Hermitage says was a severe beating - a finding confirmed by Medvedev's human rights council. Picture taken March 1, 2012. To match Insight RUSSIA/CORRUPTION REUTERS/Denis Sinyakov (RUSSIA - Tags: CRIME LAW BUSINESS)