Students joined other protesters at a midnight rally to protest the murder of a 31-year-old postgraduate trainee in Kolkata and demand a proper investigation. (Image source: PTI)
Senior forensic scientists and police officers clarified to News18 that DNA analysis is crucial in determining the exact number of people responsible for the crime.
The autopsy report of a Kolkata doctor who was allegedly raped and murdered has dismissed claims circulating on social media, citing reports that 150 grams or even 150 milligrams of semen was found in her body. The actual autopsy report clearly states that the 150 grams mentioned refers to the weight of the victim's internal or internal genitals, specifically the weight of the uterus, and not the weight of any fluids.
A senior forensic scientist told News18 that forensic scientists and doctors always record the weight of organs in such reports and in this case, 150 grams was an anatomical measurement and not the amount of fluid.
In a key development in the brutal death case of a young doctor at RG Kar Medical College and Hospital, News18 has obtained exclusive details from the post-mortem report and investigation records that may cast doubt on the claims being circulated on social media and additionally about The amount of semen found on the victim.
Forensic teams arrived at the crime scene nearly five hours after the incident and found the liquid had turned into a smear. They collected samples from the affected areas and surfaces, but no liquid or liquid was collected because it had condensed.
On August 12, three days after the crime, the collected samples, including residual blood, semen and vaginal swabs, were submitted to the Central Forensic Laboratory in Kolkata. A senior police officer said the process of collecting forensic elements, keeping them properly, processing paperwork and submitting them to the Central Forensic Laboratory requires a protocol that takes time.
The report of the Central Forensic Laboratory is expected to be submitted on Wednesday and will be forwarded to the Central Bureau of Investigation (CBI) on the authority of Kolkata Police. The report will include detailed DNA analysis to identify the perpetrators involved in the crime. Senior forensic scientists and police officers clarified to News18 that DNA analysis is crucial in determining the exact number of people responsible for the crime.
DNA analysis case pending
News18 spoke to senior forensic experts who have served at the Central Forensic Laboratory and other senior IPS officers who have worked in probing sensitive and complex rape and murder cases. According to a senior central forensic scientist, the uterus is an important organ for long-term preservation of fluids, swabs or semen.
“Once the DNA is collected and put into the machine for analysis, there is no external influence. The analysis takes time, but it provides almost accurate results,” the senior scientist said.
The scientist elaborated on key details related to the preservation and quantification of evidence in this case. In this particular case, the victim's uterus (a key organ for forensic examination) was preserved and, according to records, weighed 150 grams. The collected samples, including residual blood, semen and vaginal swabs, are mixed with other body fluids and examined by a team of experts.
“DNA samples can be very detailed. It will show whether the DNA belongs to one person or if it is mixed, as in the case of multiple offenders,” he added.
