Warren Buffett cuts off donations to Gates Foundation following Epstein revelations

Ray Madoff, a Boston College law professor who discussed Buffett's giving in her book "The Second Estate: How the Tax Code Made an American Aristocracy," said it was unclear if Buffett was legally bound to his pledge.

"A promise to make a gift in the future is not legally binding unless you get consideration," she said. "The one thing that makes Buffett's letter different is him saying, you can rely on my gift to expand operations. That could create a claim for the Gates Foundation, if it relied on Buffett's promise to its detriment."

Buffett has said that after his death, his children would oversee a charitable trust containing about 99.5% of his remaining wealth.