a 24-plus year sentence in prison. >> the rest of the family had served out their sentence and had been deported to china. chi got a just sentence and we learned a great deal about the chinese methods of operation. the mak case represented how the chinese used family. in a family you can trust one another and you know who they are and allows them to have natural relationships, but the results of our investigation, we caught a family who was committing espionage. we caught a family of spies. >> this ended up being a milestone case. it showed that we could convict people on these sorts of charges and since then, across the country, we've been able to successfully charge and prosecute people for espionage, and espionage-type crimes. >> chi mak stole sensitive navy information and gave it to the chinese government for over a