New Delhi, June 9 -- The interrogation of a man from West Bengal, arrested for the murder of a Delhi University assistant professor, has revealed that the crime was premeditated with 42-year-old visiting the Capital at least twice this year to carry out a detailed reconnaissance of the victim's house and track her routine, investigators aware of the details of the case said on Monday.

The 45-year-old victim's body, with severe injuries, was discovered inside her locked house in east Delhi's Vasundhara Enclave onJune 4.On Sunday, police arrested the man and his wife (36) and apprehended their minor son in connection with the murder. The three, tenants of an ancestral property owned by assistant professor in West Bengal's Bardhaman, had ki...