According to the Indian Express, the four men were declared innocent after the SIT probing the incident arrested three other men on Tuesday on charges of cow slaughter.
Bulandshahr SSP Prabhakar Chaudhary told the daily, “We found all four persons arrested earlier are innocent and after verifying other details, we will move the court for their release.”
The four men identified as Sarfuddin, Sajid, Asif and Nanhe of Naya Bans village were arrested on the basis of a complaint lodged by Yogesh Raj, Bajrang Dal district convenor, the main conspirator behind the mob violence is still on the run since the incident.
On December 3, a mob comprising members of Hindutva groups shot dead Police Inspector Subodh Kumar Singh, the SHO of the Siyana police station and Sumit Kumar after cow carcasses were allegedly found near Siyana village.
Singh had initially probed the 2015 lynching of Mohammed Akhlaq case.
So far, 19 people have been arrested in connection with the killings.