India, June 6 -- New Delhi

The murder of a 45-year-old assistant professor of a Delhi University college at a high-rise society in Vasundhara Enclave took place within a five-and-a-half-hour window between Wednesday afternoon and evening, the police have ascertained, adding that they have identified 13 potential suspects, besides her estranged husband.

Further, only one person was involved in the incident and the suspect was acquainted with the victim, as there was no sign of forced entry, officers aware of the investigation said on Friday.

An officer familiar with the investigation, requesting anonymity, said the last phone call made by the professor was to her mother, around 12.30pm on Wednesday. Around 6pm, the society handyman arri...