On Thursday, Chief Justice of India DY Chandrachud dismissed the "151 mg semen" theory related to the Kolkata rape and murder case, advising a lawyer against relying on social media for courtroom arguments.

His comments were made while he was leading a three-judge bench hearing a suo motu case concerning the brutal rape and murder of a 31-year-old doctor at Kolkata's RG Kar Hospital on August 9.

During the hearing, one of the lawyers pointed out that the post-mortem report mentions "151 mg (milligram) of semen," but it should actually be in milliliters (mL).

To this, Chief Justice Chandrachud replied, "Don't confuse this. Don't use social media to make arguments in court. We have specifically now the post-mortem report before us and we know what that 151 refers to. Let's not use what we read on social media and make legal arguments on that basis."

Earlier reports had claimed that 150 mg of semen was found in the victim's body, which suggested a possible gang rape. This information came from a petition filed by her family in the Calcutta High Court. However, Kolkata Police Commissioner Vineet Goyal has denied these reports.

"Someone said 150 gm semen is found. I don't know where they have found this kind of Information. And it is circulating in media in all kinds of forms. People are tempted to believe it and they are trying to create confusion among the people," Mr Goyal had told a press conference.

The Supreme Court criticized the Kolkata Police for their "extremely disturbing" delay in registering the case of the woman doctor who was raped and killed at RG Kar Hospital.

The bench, led by Chief Justice Chandrachud and including Justices JB Pardiwala and Manoj Misra, questioned the 14-hour delay in filing the first information report (FIR) and sought explanations for it. The Court also scrutinized the sequence of events and the timing of procedural formalities.

"Who was in touch with the principal of RG Kar Medical College? Why did he delay the FIR? What was the purpose?" the bench asked.

The Supreme Court is currently reviewing several petitions related to the rape and murder of a postgraduate trainee doctor at a state-run hospital. The victim was discovered dead in the seminar hall of the hospital on August 9, and medical examination confirmed that she had been raped.

Kolkata Police arrested a suspect, civic volunteer Sanjoy Roy, a day after the incident. However, due to a lack of significant progress in the investigation, the Calcutta High Court later transferred the case to the Central Bureau of Investigation (CBI).