The FIR was registered at the Gosainganj police station in the wake of mounting pressure from different quarters .
"Taking cognisance of the complaint made by Dr Sachan's wife Malti Sachan to Lucknow DIG Police, we have got a FIR registered with the Gosainganj police station against unidentified persons," said an official spokesman.
However, the slain doctor's son Sankalp Sachan is not impressed with the government's belated decision to allow a "murder" case to be registered .
Reiterating the family's demand for a CBI probe into the alleged murder, Sankalp told mediapersons, "I fail to understand why the state government is so reluctant to order a CBI probe even after two chief medical officers and a deputy chief medical officer have been murdered -- I have reason to believe that top people
including the chief minister are behind it."
Earlier, he had also pointed the finger of suspicion at the ruling Bahujan Samaj Party (BSP) MP Dhananjay Singh.
He said, "My father was killed simply because those higher-ups knew that he was all set to expose everyone once he was produced before a court; and they found it convenient to twist it as a case of suicide."
Earlier, while taking suo motto cognizance of the case, the State Human Rights Commission issued a notice to the state government alleging, "nine injuries out of which eight were ante-mortem (caused before death) and one was caused after death."
The notice, issued by SHRC member Vishnu Sahai, said: "In my prima-facie opinion if the facts stated therein are correct, in view of the substantial dimensions of the two ante-mortem injuries, coupled with the post-mortem ligature mark it requires to be deeply probed whether the deceased was first killed and thereafter strangulated or he committed suicide."
He went on to add, "I have no reservations in observing that the presence of a post-mortem ligature mark is incompatible with suicide."