 In January and February 2011, Raja's houses and offices were raided by the CBI, who seized computers as potential evidence.On 2 February 2011, the CBI arrested Raja with his aide, R. K. Chandolia, and Siddharth Behura, the former telecom secretary and placed them in Tihar jail.Raja and R.K. Chandolia are heard in conversation with Niira Radia in the released Radia tapes.