The person under investigation is based in Borella and sells land and apartments.
He has bought the land in question, at Wathuragama Road, Miriswatte, Gampaha, from one Siriwardena, who has been paid overseas.
With this incident, police are having heightened suspicion that a former president and a powerful minister have invested in this business.
A building constructed by the businessman at Ward Place in Colombo, too, has come into question.
He has now gone overseas, possibly after hearing about the investigation against him, reports say.