Tax Whistleblower Acknowledged in Dillion Case


In what is seen as a landmark decision by the US Tax Court, a whistleblower has won the right to be heard for tax information disclosed to the IRS. William Prentice Cooper, a lawyer and boyfriend of Ann Peipers, the widow of a grandchild of Dorothy Dillon Eweson gave information about tax evasion to the IRS on one of the biggest and most famous American fortunes, the one owned by famed Wall Street financier, Clarence Dillon (1882 – 1979). Dorothy Dillon Eweson was one of two of Clarence Dillon’s children who died at age 92. Her estate was worth an estimated $300 million when she died.

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