there is anil kumar, the consultant at mckinsey, rajiv goel, a personal friend and executive at intel, and rajat gupta, former head of mckinsey and a board member of goldman sachs and procter & gamble. each is risking their own career by providing rajaratnam with inside information. >> all this was going on while he knew that there was at least an s.e.c. investigation going on, and yet it was brazen because i think he just didn't think he could get caught. >> narrator: by now, the feds have enough evidence to obtain a judge's order to tap chiesi's phones, and soon, a whole slew of new sources are revealed. >> the net brought in dozens of people who were part of rajaratnam's extended circle of sources. >> narrator: there is bob moffat at ibm, who chiesi is having an affair with, and kieran taylor, chiesi's source at akamai. and from there it spirals, a dizzying web of tipsters and informants that grows every day, and at the center of at all is raj rajaratnam. >> we had uncovered what is probably the widest and broadest insider-trading operation in history. >> narrator: when "american g