On August 30, 1975 Sri C.K. Tewari, Deputy Superintendent of Police, Delai Special Police Establishment, Ranchi Brach, registered a case under S. 120B read with S. 420 of the Indian Penal Code and 5(2) and 5(i)(d) of the Prervention of Corruption Act, 1947 for investigation against (i) Sri M. Dasgupta, Senior Purchase Officer, Durgapur Steel Piant (for brevity DSP) (ii) M/s. S.N. Sunderson (Minerals) Pvt. Ltd., of 1/A, Vansitrat Row, Calcutta, (hereinafter referred to as the Company) and (iii) other concerned officers of DSP. In his complaint Sri Tweari alleged that Sri M. Dasgupta and other officers of DSP entered into a conspiracy with tea Company and in pursuance of the said conspiracy for the supply of 1,21,000 Metric Tonnes of Line Stone vide purchase order dated 9.10.74 at a rate much higher than the preventing market rate causing thereby a huge monetory loss to the DSP and a corresponding wrongful gtain to themselves or to the Company. It was further alleged that Sri M. Dasgupta, who was earlier a Senior Execute of the Company, in collation with the Company and other officers of Durgapur Steel plant awarded/caused to be awarded various other contracts during the year