The probe into the 2G scam led CBI to the doors of country's top law officer Attorney General G E Vahanvati and RBI Governor D Subbarao whose statements were recorded by the agency in connection with the multi-crore spectrum allocation.
During the examination Vahanvati was asked about his legal opinion given to the Telecom Ministry when the spectrum process begun, agency sources said.
However, Vahanvati denied in the Supreme Court that he was questioned by the CBI. Later he told reporters that the agency had approached him for some clarification.
He said that DoT had earlier sent him a press release and had sought his opinion on it. He had sent back the release to the DoT after making some notings on it, the AG said.
But the notings on the release had been tinkered with and the CBI wanted to know about it from me, he said.
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Vahanvati's statement to CBI was taken on the legal opinion relating to a press release issued by the Department of Telecommunications (DoT) on the allocation of 2G spectrum on a first come-first-serve basis.
In the statement, the Attorney General is understood to have told the CBI that two paragraphs of the press release had been deleted to suit the needs of some people following which the CBI carried out forensic examination of the handwriting in the original press release by experts.
The sources said the experts had claimed to have found that the document was forged and some words had been included separately.
Janata Party leader Subramanian Swamy had written to Prime Minister Manmohan Singh urging him to withdraw Vahanvati from spectrum hearings as he had become a party to the decision taken by Raja by giving his opinion.
The statement of the Attorney General is seen as crucial by the agency as it would help it in strengthening the case against Raja who was mainly relying on the fact that he had taken a policy decision and that it could not help in establishing alleged forgery and malafide intentions of former Telecom Minister and others involved in the case.
The CBI also quizzed Subbarao, who was the then Finance Secretary, and recorded his statement. He had raised questions over the entry fee for mobile operators ahead of the spectrum allocations.