Janata Party chief Subramanian Swamy will certified documents hinting at Home Minister P Chidambaram's involvement in the 2G scam before a Delhi court and demand CBI investigation. Swamy wants Chidambaram to be made a co-accused in the 2G case along with A Raja and Fmr FM Jt Secy & Fmr Jt Director CBI as witnesses to authenticate the documents that hinted at Chidambaram as then Finance Minister.