preet bharara, he has gone after high-profile cases and gotten convictions. >> yes, he's not done, and no u.s. attorney is done. but these crimes are like any other crimes, they're going to continue. but it's refreshing to see a u.s. attorney willing to go after people worth millions and sometimes billions of dollars and try to prate them from breaking the law. so he's making the world a better place, but he has to keep vigilant at all times. >> these are high-profile cases, and where does most of the danger lie in the market? little things going on under the radar? >> i think everywhere, ali. you say small, and this was worth millions and millions of dollars, so it attracts people who didn't have that insider information, who lost money where he may have made money and gotten bonuses. but let's say that the case is what we call small. say its worth $300,000. but if that's your $300,000. or if you were part of that, and that's your life savings, that's an important case. >> when you have to make the case, and you're pursuing one of these cases, and you have to sit this and say, this is