GARETH Graham was understood to be in the United States yesterday to meet the powerful Securities and Exchange Commission (SEC).
Loans held by the Belfast businessman's property companies were sold to US investment fund Cerberus as part of the National Asset Management Agency's controversial £1.3bn sale of its Northern Ireland loan portfolio.
Earlier this month, Mr Graham told an assembly inquiry into the Nama deal that he had made a complaint to the US commission.
While a case involving his properties was being heard at the High Court in Belfast yesterday, Mr Graham was believed to be in the US to talk to the SEC.
The US financial watchdog made headlines earlier this year by launching a probe into the behaviour of companies with links to soccer governing body FIFA, which has been embroiled in a corruption scandal.