there are new details tonight about what may be the largest swindle in wall street history, an alleged $50 billion ponzi scheme by former nasdaq chairman bernard madoff. >> what would you say to them? >> when you have a collapse on wall street, i always think of it as the water going out of a lake or something. and suddenly you can see the roots of those trees. you could see all the ugly stuff that gets caught in them, including dead bodies. that's how i feel, that the water went down so much, and everybody was like, that's bernie madoff down there. >> a wall street whiz with a golden reputation, bernie madoff earned trust from many of his clients because he made them money, lots of it, or so they thought. >> bernie madoff was a modern day dr. jekyll and mr. hyde. he had a legitimate life that was highly successful and he had a darker secret that fed his