A video clip posted on a Facebook page shows a young man with Rastafarian dreadlocks playing a percussion instrument – on a balcony, amid a row of trees and what appeared to be a hilltop against a misty backdrop. The man is Nilotpul Das, a 29-year-old sound engineer for whom music was life. A life that was cut short by a mob along with his friend Abhijit Nath, just 30, in Assam’s Karbi Anglong district on Sunday.