Peter Thiel gave the opening speech at the National Conservatism conference on Sunday.
According to Business Insider, he used the speech to go after Google for its "seemingly treasonous" relationship with China.
He alluded to the search giant's attempts to re-enter the Chinese market with a censored search engine, known as Project Dragonfly.
Thiel said the FBI and CIA should investigate Google in a "not excessively gentle manner."