CBI, in its plea, said that these persons were required to be examined as witnesses in the ongoing trial as some new facts have emerged in the investigation conducted by the ED which has recently filed a separate charge sheet against 19 accused in a 2G scam related money laundering case.
The probe agency also referred to the order passed by the Supreme Court on November 27, 2012 in which it had asked CBI, Income Tax department and the ED to work together and share information pertaining to the 2G spectrum cases.
It further said, "cognisance was taken in the matter and the complaint is now pending arguments on charge before this court. However, it has been found that some of the material discovered during the investigation conducted by the ED may have a bearing upon the present trial."
"Therefore, to place the whole truth of the matter and for a just decision in this case, it is necessary to bring this new material on record of this court...," it said in its plea which would be heard on September 1.
Apart from these four persons, the agency has sought to recall General Manager (Finance) of Kalaignar TV (P) Ltd G Rajendran, who had earlier deposed as a witness in the case, for further examination.