Alexandre Ventura Nogueira arrives at the Office of the Attorney General in Panama City, Panama April 16, 2009.
Reuters could not determine what due diligence Trump carried out in relation to the Ocean Club project.
Garten said the Trump Organization's role in the project "was at all times limited to licensing its brand and providing management services.
Nine former business partners or employees of Nogueira interviewed by Reuters accused him of cheating them and his clients.
In a lengthy interview, he described his contacts with the Trump family and his role in the Ocean Club project.
The ultimate sources of cash for other Trump real estate projects where Trump has licensed his name have drawn scrutiny this year.
After the global property crash of 2008, any chance of quick profit on the Trump Panama venture vanished. »