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Tiesto's ex-lawyer saved the DJ $28 million in taxes via illegal offshore shelters. Now, the lawyer is on the hook with the IRS.

Laura Italiano
Business Insider
March 11, 2025

LBKM Senior Counsel John Moscow commented in Business Insider on a request by federal prosecutors to order a Dutch tax attorney to pay $19 million in back taxes owed by the tax attorney's former client. 

White-collar defense lawyers and tax law experts told Business Insider they had never heard of a tax attorney or accountant being ordered to pay such a high amount of their client's back taxes.

Still, federal law holds tax preparers liable if it's proven that they knowingly hid their clients' income, said John Moscow, a longtime financial crimes prosecutor for the Manhattan District Attorney's Office.

"Nineteen million — that's a lot," said Moscow, now senior counsel at Lewis Baach Kaufmann Middlemiss in New York. "But it seems appropriate for the federal government to tell a tax preparer, 'You knew it was a crime; pay it back to us.'"

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