"Today, we questioned her at her residence for quite some time. If needed we will interrogate her again," a senior official of Kolkata police told PTI.
According to Kolkata police, Suvra was interrogated after police recovered a hard drive and a laptop on December 15 which contained details about money laundering.
"It was during a raid following demonetisation that we found those details," another police official said.
ED officials said Kumar, an assistant director of the agency, has been suspended pending enquiry even as he was removed from the cases he was probing like the Rose Valley chit fund case and some pertaining to the coal blocks allocation.
Kumar has denied the charges, saying the entire episode was being blown out of proportion and was part of a "larger conspiracy" to take him out of the case.