India, June 8 -- Three days after a DU assistant professor was found dead at her residence in east Delhi, police on Sunday arrested a couple from West Bengal and apprehended their 13-year-old son, unravelling a conspiracy to kill the 45-year-old over a dispute regarding an ancestral property she owned in the eastern state.

The suspect family were tenants in the property in West Bengal's Bardhaman that the professor inherited from her grandmother. Investigators revealed they travelled 1,400km by train to Delhi to execute the murder on June 3.

Officials said the three suspects were held on Sunday morning in Bardhaman, and the couple will be produced before a city court on Monday. Their son will be produced before a Juvenile Justice Board ...