Former Attorney General of India and senior advocate Mukul Rohatgi has called for a forensic investigation into the cash-at-home scam and said there is a need to streamline the system of disciplinary action against judges instead of the current rule of impeachment. The only constitutional action against judges, impeachment, is so complicated that in the last 75 years, no judge has been impeached, despite three or four attempts, he told NDTV in an exclusive interview.