The lifeless body of 38-year old Poipynhun Majaw was found on March 28 near a bridge in Khliehriat, in the small Indian hilly state of Meghalaya.
State police said unknown assailants killed him with a heavy iron object, possibly a wrench, which was found at the scene.
Majaw was a Right to Information (RTI) activist.
Using the RTI Act, which is similar to the US’ Freedom of Information Act, he had exposed local corruption involving the Jaintia Hills Autonomous District Council and cement companies, which were mining without council permission.
Activists say Majaw was killed because he was attempting to shine a light on the murky relationship between government and business.
Fellow campaigner Agnes Kharshiing, in Shillong, the capital of Meghalaya, says he had “wanted to do something good for his people”.
Local media reported police as saying the leads they have received into Majaw’s death received were inconclusive.
“He really tried hard, his death shook us all,” says Kharshiing. “We all know he was killed.”