Nearly Rs 1.2 crore was the installation fee which was the alleged loss to the exchequer because it was never paid, a senior official said adding that there was no estimate of recurring and call charges for the three years period 2004-07 during which the alleged exchanged operated, sources said.
The sources said the agency will carry out searches to collect evidence based on the interrogation of Sun TV Chief Technical Officer and Additional Private Secretary of Maran who were arrested last evening by CBI.
Although the agency has carried out a brief questioning of the three, it will do a detailed custodial interrogation of those arrested to collect evidence and corroborate their claims, they said.
V Gowthaman, former Additional Private Secretary of Maran, Chief Technical Officer of Sun TV S Kannan and electrcian L S Ravi also of the television network are alleged to have been directly involved in the setting up of the exchange to benefit the channel owned by Kalanithi, CBI sources said.