LAWYER Philip Teplen was hired by Gayle Dunne to help her apply for an investment visa that would allow her to live and work in the US.
He is also administering a trust that has the deeds for 38 Bush Avenue, a $2m (€1.5m) property in an exclusive part of Greenwich, Connecticut. Such trusts effectively conceal the true ownership of the property.
It has been linked to Sean and Gayle Dunne, with locals reporting that Mr Dunne introduced himself as its owner.
However, the developer has subsequently denied owning the property, while his wife has refused to comment on whether she is the owner. As well as having a business relationship with the Dunnes, Mr Teplen also socialised with them, along with his partner Lola.
Although living in Connecticut, his practice is in the Empire State Building in New York, the same building where Mrs Dunne's Mountbrook USA company is registered.
According to Mr Teplen's curriculum vitae, he has been practising law since 1983, specialising in immigration issues and real estate.
He was educated at Brooklyn Law School, Georgetown University and Oxford.
He has also figured as a commentator on immigration issues on ABC News and in local New York newspapers.