Raja said that officers in the CBI, which investigated the case, asked after his arrest: "What is 2G?" He also suggested what the apex court should have done if it wanted to know what happened in 2G spectrum allocations.
The CBI court had on December 21 acquitted Raja, Kanimozhi and all other accused in the 2G spectrum allocation case, bringing relief to DMK which had suffered back-to-back defeats in 2011 and 2016 Tamil Nadu assembly elections and also the 2014 Lok Sabha polls.
On November 2, 2007, Raja wrote the first letter to Singh, justifying the cutoff date of September 9. The CBI alleged that in this letter, Raja incorrectly described as out of context the opinion of the law ministry that the matter should be referred to the empowered group of ministers.