Police investigating the murder of Debosmita Paul, an assistant professor at a Delhi University college, are trying to identify and trace two people who were seen inside her residential complex in east Delhi's Vasundhara Enclave on the day investigators believe the crime took place. The two individuals, a man and a woman, were captured on CCTV footage with their faces covered. Investigators are examining whether either of them visited Paul's residence before leaving the complex separately about 30 minutes apart, a TOI report stated.DU Professor Murder Case: Forensic Examination UnderwayAs part of the investigation, police have collected glasses and kitchen utensils from Paul's home and sent them for forensic and DNA analysis. Officials are working to establish who may have been present inside the house before the murder.Investigators are also examining other possible leads. Sources said that because Paul frequently received deliveries from e-commerce platforms, delivery personnel who regularly visited the housing society are being scrutinised. Some domestic workers and people known to them are also under examination.DU Professor Case: Timeline of Events Under InvestigationAccording to sources, Paul had not reported to work since Tuesday. She last spoke to her mother over the phone at around 1 pm on Wednesday.Investigators suspect the murder may have occurred between 3 pm and 6 pm on Wednesday. No one is known to have seen her after that period.The crime came to light the following day when family members became concerned after they were unable to contact her.“Paul’s driver came to the society around 9.30am and found the house locked from the outside. After repeated calls to her mobile phone went unanswered, he informed her sister, who alerted police around 2.30pm,” said a senior officer.CCTV Footage and Visitor Records ReviewedPolice have examined the visitor register maintained by the housing society and reviewed footage from more than 100 CCTV cameras. The exercise is aimed at reconstructing movements within the complex and identifying everyone who entered or exited the premises during the relevant period.Sources said investigators identified around 180 individuals whose movements were recorded in the area during the suspected time of the murder. By Friday evening, all but 13 people had been located and cleared of suspicion. The remaining individuals include the two masked persons seen in CCTV footage.Security Gaps Emerge During InvestigationDuring the probe, investigators found possible weaknesses in the society's visitor management system.“If a resident directly authorised entry by speaking to the main gate guard, or if a visitor could speak to the resident through the guards, their details were sometimes not recorded in the register,” a source said.Police also found that certain parts of the residential complex were not covered by CCTV surveillance, creating challenges for investigators trying to establish a complete sequence of events.Family, Neighbours QuestionedPolice have recorded statements from Paul's family members and are continuing efforts to piece together the circumstances surrounding the crime.Investigators have also spoken to neighbours, who described Paul as a private person who generally kept to herself.The incident has left residents of Satyam Apartment concerned about security arrangements within the gated complex.“This is shocking and unbelievable! She was a warm person, often spotted during walks. We never thought a crime like this could happen inside a gated, secured premises like ours,” said a resident. “We have been told there were many lacunae in the security setup, and have demanded their rectification.”