Lucknow:
The Central Bureau of Investigation (CBI), which is probing the murder case of Kunda Deputy Superintendent of Police Zia-ul-Haque, has sought permission from the special court for conducting a lie detection test on former Uttar Pradesh minister Raghuraj Pratap Singh, popularly known as Raja Bhaiya.
The agency wants to leave no stone unturned as it often stands accused of doing the political bidding of the Centre.
Last month, Raja Bhaiya was grilled for more than 20 hours over a span of two days, but was allowed to return as the CBI did not find any credible evidence to seek his custody.
Now with the polygraph test, the CBI hopes to solve the mystery behind the larger conspiracy of the killings of the DSP and two others.
Mr Haque's wife Parveen Azad had accused Raja Bhaiya of being involved in the murder case. The allegations forced him to resign from as Minister of Food and Civil Supplies from the Akhilesh Yadav government in March.
Mr Haque was killed on March 2 in Pratapgarh district where he had gone to probe a village headman's murder. An angry mob reportedly cornered him, and eight policemen who were with him allegedly abandoned him. Three bullets were fired - one killed Mr Haque; the other two killed headman Nanhe Yadav's brother.
The CBI had registered four cases pertaining to the three murders and booked Raja Bhaiya in one of them.
Raja Bhaiya, who has a lengthy criminal record, has denied the allegations against him.
After getting the case, the CBI had formed a 10-member team for investigation. The team had made some important recoveries, including the service revolver of Mr Haque.
It filed a chargesheet last month against five people but did not name Raja Bhaiya.