Nidhi, who is not an accused in the case, was examined about details relating to an alleged conspiracy to eliminate Dabholkar as the agency believes she might be witness to some development when it was being hatched, sources said.
Searches were also carried out at her properties on the outskirts of Mumbai. Sources said the agency has information about her participation in programmes against Dabholkar with her husband, besides, she had been an active member of Sanatan Sanstha, which is under scanner in the case.
They said the agency would also ask her about cyber forensic evidence like email, messages recovered from the laptops of Tawde, which were sent to Sarang Akolkar, another suspect against whom a Red Corner Notice is pending in 2009 Goa blasts. Dabholkar was killed in Pune on August 20, 2013.