LUCKNOW, March 31 -- Even 22 days after Sitapur journalist Raghvendra Bajpai was shot dead in broad daylight, police investigators have failed to get any breakthrough in the case.

"The real cause for the murder, as well as the identities of people involved in executing the crime, could not be ascertained so far even after scanning over several thousand active phone numbers that were present near the spot at the time of the incident and dozens of video footage of suspicious persons present near the victim's house and in the adjoining vicinity," said a senior police official privy to the investigation.

Bajpai, 36, was murdered on the Lucknow-Delhi highway under Imaliya Sultanpur police station limits of Sitapur on March 8.

Sitapur superi...