Sources in the Central Bureau of Investigation have confirmed that they are likely to give a clean chit to former Uttar Pradesh minister Raghuraj Pratap Singh alias Raja Bhaiya in the murder case of Kunda Deputy Superintendent of Police Zia-ul-Haque.

Sources say the results of Raja Bhaiya's polygraph test are negative. The CBI is expected to submit its probe report along with the results of the test in a court in Lucknow today.