An FIR has also been registered against six policemen in connection with the incident, police said today.
Brij Mohan Awasthi was taken into custody yesterday on charges of manufacturing illicit arms and the city police carried his body to the district hospital just a few hours after that claiming that he had committed suicide.
Police then allegedly obtained a statement from his wife Rani to substantiate their suicide story but the son of the deceased, Amit alleged that his father was murdered and cited injury marks on his body.
City kotwali in-charge Ishtiyaq Ahmad, Mishrana outpost incharge Narvadeshwar Tewari and four others have been named in the FIR, police said.
Additional Superintendent of Police BB Singh said kotwali in-charge and the outpost in-charge have been suspended.
District Magistrate Gaurav Dayal has ordered a magisterial probe into the incident and directed that the post-mortem examination be videographed.