but what dennis levine did is what led to ivan boesky. >> ivan boesky has been fined the largest penaltystry. >> 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 boesky was a 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 boesky arrived in court to hear himself described as a man whose arrogance has been stripped away. there's no doubt he's become a symbol of what's wrong with wall street. >> the news of the boesky indictment was like the bombshell on wall street. >> what do we call greed the day before an indictment is filed? >> recently, we called it success. people such as ivan boesky were being hailed as heroes at the peak of their careers. >> many of america's small investors have been appalled. >> i think they should put them in jail. >> more than 48 cases of insider trading brought by new york's attorney rudolph giuliani. >> he had the aura of b

he famously prosecuted wall street's iben boesky. he took credit for making manhattan safe again.9/11. >> all we know is that two airplanes struck two towers of the world trade center. >> reporter: he was the picture of calm and strength, quickly becoming america's mayor. "time" magazine named him person of the year. he failed in his own 2008 presidential bid. but in 2016, he was back on the campaign trail, playing surrogate to donald trump. >> and he will be the leader of the change we need. >> reporter: but this was not the same rudy giuliani. he's always been aggressive and unapologetic. but he was peddling outlandish conspiracy theories. in one he was saying hillary clinton had some mysterious illness. he mocked clinton's leadership skills, too, with this disturbing display. >> he didn't look like hillary clinton with one of those long answers. >> reporter: what happened to the old rudy? it was such a head scratcher it prompted this politico headline. is rudy giuliani losing his mind? at one point on the trail he even seemed to forget who attacked the u.s. on 9/11. >> under th

he famously prosecuted wall street's ivan boesky, and michael mill kin. after becoming mayor of new york city in 1993, giuliani took credit for making manhattan safe again. then came 9/11. >> all that we know right now is that two airplanes struck the two large towers of the world trade center. >> reporter: giuliani was the picture of calm and strength, quickly becoming america's mayor. "time" magazine named him person of the year. >> that's the kind of leadership we need in washington. that's why i'm running for president. >> reporter: giuliani failed in his own 2008 presidential bid, but in 2016 he was back on the campaign trail, playing surrogate to donald trump. >> and he will be the leader of the change we need. >> reporter: but this was not the same rudy giuliani. he's always been aggressive and unapologetic, but now giuliani was peddling outlandish conspiracy theories. in one, he insisted that hillary clinton had some mysterious illness. >> go online and put down hillary clinton illness. take a look at the videos for yourself. >> reporter: giuliani