in November 2008, Swamy amongst others wrote the first of five letters to Prime Minister Manmohan Singh seeking permission to prosecute A. Raja in regard to 2G spectrum case. After not receiving any response, Swamy decided to file a case on his own in the Supreme Court of India regarding the matter, which then asked the Central Bureau of Investigation to produce a detailed report on it. He further called on the Indian government to re-auction the 2G spectrum without the involvement of Communications Minister Kapil Sibal.