In 1984, like generations of people from the west of Ireland before them, siblings Donal and Helen O’Sullivan emigrated in their mid-20s to build America. They now face 11 US federal criminal charges after being arrested by federal agents in New York on Thursday along with Padraig Naughton, the financial controller of their company Navillus and an Irish national also. Originally from Ballingskellings, Co Kerry, the O’Sullivans established the firm in 1987 with their brothers Kevin and Leonard, who have since left the business. Its name spells “Sullivan” backwards. Donal is now president and owner of Navillus, while Helen is its…