Kapoor is being currently investigated on allegations of money laundering.
He was arrested early on Sunday morning by the Enforcement Directorate after extensive questioning for over 30 hours.
Sources informed that the Income Tax department is investigating the case and is trying to ascertain if there is a link between Kapoor and Priyanka Gandhi.
The purchase of the painting was revealed during the interrogation.
Congress, however, has not denied the purchase and said that the mere transaction doesn’t necessarily indicate any wrongdoing.
Kapoor’s Mumbai residence was raided on Friday and the investigating agency is primarily investigating Kapoor, his wife and three daughters over a Rs 600 crore fund received by DoIT Urban Ventures (India) Pvt Ltd- a firm allegedly ‘controlled’ by them.
The fund was received from the scam-hit Dewan Housing Finance Limited (DHFL).