raj rajaratnam had it all -- a wildly successful hedge fund, billions in the bank, and the respect of. >> raj was a competitor first. he wanted to win. he wanted to win every day. >> narrator: but behind closed doors, rajaratnam was gaming the system -- to the tune of $75 million. >> inside trading became his business model. >> narrator: and each time rajaratnam's phone is ringing, the feds are listening. and ultimately, it's his own voice that will seal his fate.