New Delhi, Feb. 13 -- Dr Sandip Ghosh, the controversial former principal of Kolkata's RG Kar Medical College, gave all contracts of the institution to a cartel of firms owned by two people for which he charged 10-15% commission in cash, the Enforcement Directorate (ED) has claimed in its charge sheet filed last week, officials familiar with the development said. The alleged bribes, worth around Rs.70 lakh in total for contracts worth Rs.6.89 crore, was received in cash and deposited in the bank accounts by showing it as professional fee for providing services at private clinics, the agency has claimed. Ghosh, according to ED, was associated with four private clinics which he was not supposed to do as his designation in RG Kar was a "non-practicising" position. The federal agency filed a charge sheet against Ghosh, two vendors , Biplab Singha and Suman Hazra and a company, Hazra Medical , as part of its money laundering probe into the financial affairs of RG Kar hospital and medical college, which surfaced days after the rape and murder of a 31-year-old post-graduate trainee doctor inside the institution in the early hours of August 9, 2024. "Sandip Ghosh conspired with Biplap Singha and Suman Hazra to manipulate the procurement and tendering process of RG Kar hospital. Once the procurement order was issued, Ghosh ensured that Singha and Hazra got all work orders exclusively. They had formed a cartel of firms through which they would submit proxy quotations, false documents and ensured that nobody else could bid. They also ensured the lowest and the highest bidders would be a firm owned by the cartel members," said an ED officer, quoting details of the charge sheet. The agency claimed it has found that Ghosh issued work and supply orders by "artificially splitting purchase proposals and approved procurement of materials at grossly inflated and exorbitant prices". Elaborating on the bribes received by Ghosh, the agency has claimed in its charge sheet, according to a second officer, that Ghosh provided medical services to four private clinics. The commission from Singha and Hazra, the second officer said, was shown as professional fee in tax returns,he added. The agency has found that Ghosh and his wife bought a farmhouse named Tapti in South 24 Parganas in 2014. This has been attached by ED under the PMLA Act....