THIRUVANANTHAPURAM: S Radhakrishnan Nair will take charge as DIG, Pallippuram CRPF camp on Friday. He will replace incumbent DIG Mathew John, who has been transferred to Srinagar. Radhakrishnan, a native of Thiruvallam, joined the CRPF in 1983 on sports quota. From 1983 to 1991, he was a national swimming champion in the breaststroke event. He has represented the country in several international events, including the Asian Games, and won many laurels . He was the recipient of the President’s police medal for meritorious service in 2012.