Underworld gangster Rajendra Sadashiv Nikhaljee alias Chhota Rajan’s conviction along with his eight cronies on May 2 in journalist Jyotirmoy Dey’s, also known as J Dey, murder case seems to have sent a wave of euphoria in the CBI, but the agency’s investigators are consistently preparing for another major task -- extradite gangster Ravi Ram Rattesar and convict him in the case.