The Justice Department and FBI are looking into the structure of fantasy sports to determine if the business model violates federal law. The move comes after recent controversies involving fantasy sports sites FanDuel and DraftKings, which were accused of rigging their systems to help employees earn big winnings. FBI agents have begun talking to DraftKings customers to ask them about their experiences with the company. The probe is only in its early stages but is part of a larger conversation in the Justice Department about the legality of the sites in general.