The Assam CID's SIT, probing Zubeen Garg's death in Singapore on September 19, has nearly completed its investigation into the high-profile case. A voluminous chargesheet is set for submission next week at the Chief Judicial Magistrate's Court in Guwahati. SIT chief, M.P. Gupta speaks exclusively to NDTV's Ratnadip Choudhury.