Home Minister RR Patil has said he along with Director General of Police (DGP) Sanjeev Dayal and Joint Commissioner of Police (Crime Branch) Himanshu Roy watched the CCTV footage of the assault, but it does not clearly show all legislators who were present at the time of the incident last week.
"The footage is inconclusive. Though there are about 28 cameras in the Assembly premises, they could not capture the incident clearly," Mr Patil said.
Two MLAs, Kshitij Thakur (Bahujan Vikas Agadhi) and Ram Kadam (Maharashtra Navnirman Sena), were arrested for allegedly thrashing Sub-Inspector (Traffic) Sachin Suryavanshi inside Vidhan Bhavan premises on March 19. The two lawmakers, currently out on bail, however, did not reveal names of other legislators involved in the incident, which caused an outrage.
The Crime Branch was banking on the CCTV video to nail other attackers and prepare a water tight case, said a police officer.
Mr Suryavanshi was allegedly thrashed by around 10 to 12 MLAs a day after he stopped Mr Thakur's car and fined him for speeding on the Bandra-Worli Sea Link.
Following the attack, Mr Thakur, Mr Kadam and three others were suspended from Assembly till December 31 and a Crime Branch probe was ordered.
The Home Minister later suspended Mr Suryavanshi for allegedly misbehaving with Mr Thakur. A Crime Branch officer, PV Nigde, was also suspended for allegedly entering the Assembly premises without a pass while investigating the case.