Two Uttar Pradesh police constables, who reportedly shot dead Vivek Tewari in Lucknow on Friday night, have been booked under murder (Section 302 IPC) case, UP ADG Law and Order, Anand Kumar told reporters. Meanwhile an SIT has been formed to probe the incident. Keeping in view the sensitivity of the case and media uproar over the case, the Uttar Pradesh Police filed FIR on Saturday.