The decomposed body of Sourabh Kumar Rao, a purchase officer of railways store department in Kharagpur, was found on September 22 after police broke into the quarters following complaints by locals that foul smell was emanating from there.
Holding a candle light march at Jantar Mantar here, BIT Sindri Alumni Association claimed Rao was an honest person who had refused taking bribe from some local mafia members.
Pranoy Kumar, former general secretary of the association, said they were holding protests in 24 states, including Ranchi, Kolkata and Banglore, and added that they would also give a representation to the Prime Minister's Office as well as Railway Minister and Home Minister tomorrow seeking a CBI probe in the alleged murder case.
They said they would also meet West Bengal Chief Minister Mamta Banerjee seeking an impartial probe by the police.
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Rao's family has alleged that his death was not investigated for 10 days and after the post-mortem report was deemed "inconclusive", the police took little action.
The alumni members alleged that even before the post mortem report came, the local police came to the conclusion that Rao died "due to snake bite", though there were blood stains at several places at his house.
Dissatisfied with the police's probe, Rao's family and friends started a campaign for justice on the social media which prompted the railway minister to intervene and forced the police to file a case of murder.