There have been no allegations of legal improprieties in recent years, save for a salacious sexual harassment complaint filed in 2005 by an employee of the Helly Nahmad Gallery in Manhattan.

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At the same time as Mr. Trincher's arrest, the FBI said it staged a raid roughly 20 blocks north at the Helly Nahmad Gallery inside the Carlyle Hotel on Manhattan's Upper East Side.

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Among those who pleaded not guilty was Hillel Nahmad, of the prominent Helly Nahmad art gallery.

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