A court of 1st class Judicial Magistrate, K M Lyngdoh Nongbri remanded Champion Sangma to 14 days judicial custody.
Champion Sangma, a former deputy superintendent of police, who co-founded the Garo tribal militant outfit in the fall of 2010, was pushed over to India by Bangladesh authorities on July 30 last before he was arrested at the Indo-Bangladesh border.
The public prosecutor said Champion Sangma has been booked in nine cases -- four in Tura, two in Williamnagar and one in Mendipathar and two in Nongstoin -- for criminal activities including waging war against the nation.
Meanwhile, Champion Sangma was whisked away by the police when he tried to speak to the media after the hearing.
He said, "I have made some suggestions..." but before he could complete, he was taken away quickly into a waiting police vehicle.