His conversation with the prosecutor, who was removed from the case, reflected that the entire strategy of CBI in dealing with the case was compromised, the agency has said.
CBI said it had registered a Preliminary Enquiry report which named Chandra and prosecutor Singh.
The investigation also suggested that the conversation took place between the two when the statement of crucial witness A K Srivastava, Department of Telecom's former Deputy Director General (AS) was being recorded in the court, it has said.
The agency has also stated that the CFSL report has confirmed that the recorded conversation was neither tampered with nor any editing was done and it was the voice of Chandra and Singh.
