The agency which probed the mysterious death of Batcha in 2011 had filed a closure report in August, 2012 concluding that he had committed suicide.
Batcha was running a company through which the agency suspected alleged illicit remittances of 2G case were routed.
CBI sources said they have taken note of the claims made by 24-year-old Prabhakaran at Tiruchirapalli Press Club yesterday that he and two others had murdered Batcha in 2011 and any further action will be as per provisions of the law.
Prabhakaran claimed Batcha was murdered after he gave CBI "vital information" that went against Raja in the 2G case.
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Batcha was found hanging in his house at Teynampet in south Chennai by his wife and driver, nearly a month after Raja's arrest in the 2G case.
Batcha had left a suicide note stating that he was "embarrassed" by the raids of various enforcement agencies and the extensive media coverage of them. The agency had concluded that the suicide note was in his own handwriting.