Commenting on the FIR filed against Singh, executive director of People's Watch, Henry Tiphagne, who accompanied some SC victims to the inquiry, demanded the arrest of the IPS officer.

"We will bring up the Ambasamudram police station CCTV camera issue (of recordings going missing) before the Supreme Court on Tuesday. The Madurai Bench of the Madras High Court is also hearing another case related to this custodial torture the same day. To escape from the courts’ wrath, the FIR has been filed now," Tiphagne said.

He also demanded that an IG-level officer be appointed as inquiry officer in the case against Singh. "Sections under Scheduled Caste and Scheduled Tribes (Prevention of Atrocity) Act and Juvenile Justice (Care and Protection of Children) Act should be added to the FIR," he said.

Advocate Maharajan, who is assisting eight victims in the case, demanded a CBI inquiry stating that the Tamil Nadu IPS Officers Association may influence the inquiry officer if the investigation is conducted by a state agency.

"Police should include Section 307 of IPC in the FIR as Singh attempted to kill E Mariappan by crushing his testicles. The victim is still under treatment. Separate cases should be registered against Singh for the crimes that took place in various police stations at different times," he said.