discovered that, in fact, they were discussing copying discs and giving them to his brother, how they were going to take these discs back to china. >> based on information we had, we believe the quiet electric drive, the very sensitive navy submarine data is on that disc. >> tai mak then took that disc home and gave it to billy, his son, who was in charge of the ibm thinkpad laptop which had the encryption program on it. >> tai mak wasn't so good at doing the encryption on his own. we don't believe billy was originally part of the plan but tai mak asked his son to help encrypt the information his uncle chi mak had given him. we found out fuk li made some calls and said we're going to china. the very next day, tai mak called the handler pupei leung in china.