His conviction and sentence was subsequently upheld by the Gauhati high court in 1998 and the Supreme Court in 1999. He had moved in 1999 a mercy plea, which remained pending for eleven years before the President and was rejected in 2011. Das had then filed a writ petition in the apex court pleading for commuting the death sentence to life imprisonment since he had already spent about 14 years in jail during the disposal of his petition seeking presidential clemency.
He is currently lodged in Jorhat Central Jail in Assam.
(With inputs from PTI)
Source: http://articles.timesofindia.indiatimes.com/2013-05-01/india/38956539_1_death-sentence-mercy-plea-m-n-das [accessed on 2nd May 2013]