Some of the documents related to the rape and murder of the 31-year-old junior doctor of RG Kar Medical College and Hospital were altered and fake ones created at Tala police station, the CBI told a Sealdah court on Wednesday while producing Sandip Ghosh and Abhijit Mondal, two of the accused in the case.

Ghosh is the former principal of RG Kar and Mondal officer-in-charge of Tala police station when the postgraduate trainee was found raped and murdered on August 9.

“...during custodial interrogation of both the accused persons new/additional facts have emerged to the effect that some false records pertaining to the instant case were created/altered in PS Tala,” the CBI’s forwarding note to the judge said.

The CBI lawyer told the court the revelation came during the custodial interrogation of Ghosh and Mondal.

“The CCTV footage of Tala police station along with the hard disk and digital video recorder has been sent for forensic examination. The results are expected within a few days. We’ll interrogate them once the results reach,” the CBI lawyer told the court.

The CBI had earlier said the officer-in-charge of Tala police station lodged a general diary in the case at 11.30pm and there was an “inordinate delay of around 14 hours”.

The CBI sought jail custody of the two till September 30 that the court granted.

Mondal’s lawyer told the court that on August 9 the officer received the information around 9.30am and reached the spot by 10.30. There was no deliberate delay on the part of the officer, he said. The CBI summoned Mondal for questioning as a witness and later arrested him, he added.

“No evidence is available to suggest Mondal was part of a conspiracy, as alleged, and he should be granted bail,” his lawyer told the court.

Ghosh’s lawyer argued that the charge of greater conspiracy against him was yet to be proved and pleaded for bail.

The judge turned down the bail pleas.

Earlier in the day, a CBI team questioned Apurba Biswas, professor in the department of forensic medicine and toxicology at RG Kar Medical College and Hospital, for the second day.

Biswas was the senior-most among a board of three doctors that conducted a post-mortem of the junior doctor.

Sources said the CBI probe team asked Biswas about the nature of injuries that were found on the junior doctor’s body and what they revealed from a forensic point of view.