Prosecutors contend Robert Brockman began building his dementia defense right after he was indicted.
Billionaire Robert Brockman faces a charge he failed to pay taxes on $2 billion.
U.S. authorities want information about wealthy Americans suspected of using a Panamanian law firm to evade taxes.
Robert Brockman's claims of dementia did not move a panel of experts.
Land conservation deals are the focus of a growing Internal Revenue Service crackdown.
The government only has to show an asset was “the product of tainted funds” to take it in a civil forfeiture proceeding.
The IRS is cracking down on syndicated land deals that it says are actually abusive tax shelters.
While Congress encourages land conservation, disputes often arise over how property owners use the tax incentives.
Former Credit Suisse Group bankers blew the whistle on their employer for helping wealthy Americans dodge taxes.
Smith agreed to a deal in which he admitted to tax fraud and paid $139 million.