New CBI Director Amar Pratap Singh today emphatically said the premier investigative agency will act in a very fair and impartial manner in all cases. In a brief interaction with media after he took over as the new Director succeeding Ashwani Kumar, Singh said improving forensic department, filling up all vacancies in the force and getting rid of pending cases are the main challenges before him. Amar Pratap Singh ,a 1974 batch IPS officer from Jharkhand cadre, was serving as Special Director of the agency. He has also held post of additional Director General in BSF and is a recipient of Indian Police Medal and President's Police Medal.