For years, investors, rivals and regulators all wondered how Bernard L. Madoff worked his magic.<\/p>\n
But on Friday, less than 24 hours after this prominent Wall Street figure was arrested on charges connected with what authorities portrayed as the biggest Ponzi scheme in financial history, hard questions began to be raised about whether Mr. Madoff acted alone and why his suspected con game was not uncovered sooner.<\/p>\n
As investors from Palm Beach to New York to London counted their losses on Friday in what Mr. Madoff himself described as a $50 billion fraud, federal authorities took control of what remained of his firm and began to pore over its books.<\/p>\n
But some investors said they had questioned Mr. Madoff\u2019s supposed investment prowess years ago, pointing to his unnaturally steady returns, his vague investment strategy and the obscure accounting firm that audited his books.<\/p>\n