1. The first petitioner is the Chairman of the second petitioner Firm and they are taken as accused Nos.2 and 3 in RC No.47A of 2008 pending investigation on the file of the respondent/CBI for offences punishable under Section 420 read with Sec.120B IPC. The respondent registered the case on the basis of Source Information Report as against the petitioners and A-1, who was functioning during the relevant period as Director, BCG Vaccine Laboratory, Chennai, and Pasteur Institute of India, Chennai. The allegation is that, during 2006-2007, the first accused, pursuant to criminal conspiracy with the petitioners/A-2 and A-3 to cheat Government of India, without valid authorisation, entered into an agreement with the second accused for supply of Measles Seed (Edmonstons), Rubella Virus Seed (RA-27-WISTAR) and Human Diploid Cell Line and for manufacture of Measles and Rubella Vaccine; thereby, caused wrongful loss to the Government of India to the tune of Rs.3.25 crores and corresponding wrongful gain to themselves. By setting in motion the task of investigation, the respondent/CBI collected materials in the form of documents and communications between the parties and the Governm