A 40-year-old man employed at the residence of an industrialist at New Friends Colony was set ablaze by unidentified people on June 9, police said.
The victim, identified as Janeshwar Sharma (40), succumbed to his injuries on Wednesday. Sharma, who used to work as both a driver and an office boy, was employed with the industrialist for the past five years.
Sometime before his death, he reportedly left behind a letter, claiming a threat to his life from the industrialist and two other people.
"On June 9, Sharma came running out from the house with his body ablaze. He was rushed to a hospital by the household staff, where he succumbed to his injuries on Wednesday. We have registered a case of murder against unknown persons," said Virender Singh Chail, additional commissioner of police (southeast).
Before his death, Sharma had allegedly written a letter and kept it with an unidentified person. Police said they had seized the letter and were examining its veracity.