The CBI questioned suspected middleman Sanville Adrian D'Souza for the second day in a case of alleged attempted extortion of Rs 25 crore from actor Shah Rukh Khan for bailing out his son Aryan in NCB's Cordelia drug bust case, officials said on Wednesday.

The CBI may arrest D'Souza if his responses are not found satisfactory or the investigating officer finds him evasive, they said.