Shiranthi has failed to show how she had acquired the money to buy the property at no. 260/12, Torrington Avenue, Colombo 07.
A senior police official told Sri Lanka Mirror that instructions have been sought from the AG to file a case against her under money laundering charges.
The police official said a person by the name Lokuwithana too, was connected to this deal.
When questioned by the FCID, Shiranthi claimed she had obtained a loan from her nephew, businessman Dilshan Wickremasinghe to buy the property.
Mahinda Rajapaksa lived in this house in 2000 and it was given as the address for Siriliya Saviya, Nil Balakaya and Tharunyata Hetak organizations.
It is presently being used as a warehouse.