No - the CIA did not find Satoshi and throw him in Gitmo and waterboard him for his keys.
Yes - Satoshi believed that continued use of his established digital identity (forum account, email server, etc) with the CIA/NSA actively looking into him would result in his de-anonymization. This was two years prior to release of the Snowden documents, which shows Satoshi was savvy enough to know his both his own limits of op-sec and the extent of logging infrastructure that had been put in-place to ensnare people like him.
I guess if anyone could deanonymize Satoshi, it would involve subpoena or hacking forums on which he talked and getting the ip address, and then going to the ISP and again subpoena for who paid for that address. How long those logs are preserved and whether that leads to a real identity are unclear.