Kanpur, July 20 : The post-mortem report of gangster Vikas Dubey, the main accused in the ambush and murder of eight police officials in Bikru village, has revealed that Dubey died due to 'haemorrhage and shock' due to ante-mortem firearm injuries. The history-sheeter was arrested from the Mahakaal temple in Madhya Pradesh's Ujjain on July 9. Later, on July 10, while he was being brought to Kanpur form Ujjain, the vehicle in which he was being taken, reportedly overturned and Dubey tried to flee after snatching the firearm of a policeman. When the police asked Dubey to surrender, he started firing at the police, leading to a gun battle that finally killed the gangster in the cross-firing. The Uttar Pradesh government later formed an one-member judicial commission, under retired Justice S.K. Aggarwal, to probe the encounter after the opposition claimed that the gangster was killed in a 'fake encounter' to protect the identity of his political masters. The commission has been given two months' time to submit its report. Earlier, the state government had formed a Special Investigation Team (SIT) to probe the rise of Vikas Dubey and the role of the police. The three-member Special Investigation Team, headed by Additional Chief Secretary Sanjay R. Bhoosreddy, has issued a mobile number besides an e-mail id and postal addresses for the people, including their representatives, to contact the SIT and apprise it of whatever facts they may know regarding the slain gangster and his accomplices. /IANS