The 53-year-old technical assistant at a government institution in Nalanda, Sanjeev Mukhiya, is the focus of the investigation of the Bihar Economic Offences Unit (EOU).
According to the SP, the couple had spoken to local police personnel about the threat to their lives posed by Chandni's family members and had been warned that now was not the time to return.
The body was picked up directly from the road and thrown into the river by some policemen in an inhuman manner from the top of the bridge with a stick.