. >> investment banker dennis levine collected $12.5 million in illegal profits.from a phone booth, he'd call an accomplice in the bahamas who would buy stocks in the names of two dummy corporations which levine had set up in panama. >> the levine case was the first time the s.e.c. has been able to nail down insider trading by one of wall street's big dealmakers. somebody with a million dollar a year salary, which apparently wasn't enough. >> insider trading could become wall street's watergate. >> plea bargaining is now under way with dennis levine. authorities might be able to develop a list of new suspects. >> we start the investigation, and once his lawyer advised him it was in his interest to cooperate, he would give you the information. to him, it was just another deal. >> i think the judge made clear that he would have given a heavier sentence except for the cooperation. >> dennis levine was one guy doing insider trading, and that's not something that's new. but what dennis levine did is was lead to ivan boesky. >> the securities and exchange commission stu