Tonight to the whistle blower making global headlines back in the news edward snowden, who revealed the nation's sweeping surveillance system sparking new concerns that he could be trying to defect to... See More
Tonight to the whistle blower making global headlines back in the news edward snowden, who revealed the nation's sweeping surveillance system sparking new concerns that he could be trying to defect to china, taking american secrets with him. Brian ross on this again tonight. Reporter: As protestors in hong kong rallied to the cause of edward snowden today, american authorities told abc news they fear he may be about to defect to china with a trove of america's most sensitive secrets. We're going to make sure there's a thorough scrub of what his china connections are. Reporter: Snowden himself was defensive when specifically asked by the guardian newspaper whether he had come to hong kong to defect to china? We're not at war in an flikt and we're not trying to be. Reporter: He claims he has documents downloaded from the post in hawaii where he worked that showed the u.S. Has been hacking into chinese computer networks for years. He copied documents and made a run for it. He's not a whistle blower and maybe worse. Reporter: The last time an american spy posed touch such a THREAT WAS IN THE 1970s WHEN Phillip said his conscious bothered him, revealing hundreds of spice rngs companies and foreign agents. Reporter: The cia continues to engage in these operations. Reporter: Snowden grew up in the shadow of the nsa in maryland where he showed signs of brilliance but dropped out of high school, tried to become a model and found his calling in the world of spies and the internet. He's very well spoken, very sharp and has a self-absorbed evening test cal flavor to what he's saying. He's doing it to be the hero. Reporter: Snowden reportedly went to hong kong with four laptops loaded with top secret documents. Officials say one way or another they believe choiz security agents will get their hands on those documents. Brian ross with us back here in new york tonight. Thank you.
This transcript has been automatically generated and may not be 100% accurate.