insider trading could become wall street's watergate. >> plea bargaining is now underway with dennis levineto develop a list of new suspects. >> we start the investigation, and once his lawyer advised him that his in his interest to cooperate, he would give you the information. to him, it was just another deal. >> i think the judge made it 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 new. but what he did was lead to ivan boeski. >> ivan boeski has been fined the large evident penalty ever and has been banned from wall street. >> he did what he claimed he would ever do, use insider information to buy huge blocks of stock in companies secretly involved in takeover deals. >> ivan boski was an out and out crook. handing bags of cash to people who would give him inside information. >> if we had capital punishment for white collar crimes, i would say he would be a prime candidate. >> ivan arrived in court to hear himself described as a man whose arrogance has been stripped away. there's no doubt he'