-- if we fold, we will have nothing." >> whitaker: four months after xi's arrest, his lawyer peter zeidenbergonsistencies to the u.s. attorney's office in philadelphia. three weeks later, they dropped the case. zeidenberg sees disturbing parallels with sherry chen's case. so how did she get in trouble? >> zeidenberg: the story started when she went to china to visit her parents. she had a somewhat happenstance meeting with a former classmate of hers, a vice minister in the water ministry. >> whitaker: the vice minister asked chen how the u.s. pays for dam repairs. did you think there was anything, i don't know, secretive about that information? >> chen: it's never crossed my mind. it's not a secret. >> whitaker: when chen got back to ohio, she asked her boss for publicly available information, which she did send to he she also searched this government database. since she wasn't a regular user, chen borrowed a password from her colleague. sharing passwords was common in the office. she never sent information from the database to china, but federal prosecutors charged chen with illegally access