The National Democratic Front of Bodoland (NDFB) militant outfit's former leader I K Songbijit who had joined the Bharatiya Janata Party (BJP) remained untraceable by the National Investigation Agency (NIA).
A charge sheet was filed by the NIA against Songbijit in the case. He has been summoned to appear before a court.
The former militant leader has been asked to appear before a special NIA court on January 29.