Dan H. Duncan died in late March, 2010 of a brain hemorrhage at seventy seven. Forbes magazine estimated his worth at $9 billion, ranking him as the 74th wealthiest in planet. Had his life ended 90 days earlier during 2009 his $9 billion would have been under a federal tax for a minimum of 45 percentage points. Had he lived past December 31, 2010 his $9 billion would are subject with tax rate of 55 percent. Regarding the timing of his death his children and grandchildren will get $9 billion free virtually any estate tax. Because in the timing of Mr.