New Delhi, April 6: The investigators of NIA’s Guwahati branch arrested a 26–years–old hardcore cadre of tiol Democratic Front of Bodoland (Songbijit) on April 4. Jwnglaw rzary alias Jekhai, a resident of Kokrajhar district of Duligaon, BTAD, was taken into custody for his involvement in a case relating to killing of innocent civilians in Kokrajhar district of Assam in December 2014.