Lewis duPont Smith died on August 12, 2011, at the age of 54, of pancreatic cancer. See this obituary. He had made headlines in the 1980’s and early 1990’s. He was the heir to two fortunes, and had been declared mentally incompetent by Pennsylvania state courts, after he had donated $212,000 to the Lyndon LaRouche political organization and then had told that organization that he was forgiving the loan and that he was about to donate another $75,000. Even though Smith’s wife was also a supporter of LaRouche, Smith’s parents and other family members succeeded in persuading a court that he could not be trusted with his own finances. Further controversy came about after Smith’s relatives allegedly plotted to have him physically kidnapped to get him away from various other supporters of LaRouche. Here is a lengthy background story, published in 2008 in Vanity Fair.