how big his operation is. >> e-mail is an extremely rich source of evidence for law enforcement, but that doesn't mean you can just read somebody's e-mail in a law enforcement investigation because you're interested. you still have to develop probable cause and obtain a warrant from a federal judge in order to gain access to their e-mail. >> so dave said let's do a few more purchases and let's verify that this wasn't a fluke. me and my counterpart went through another website. we sent a western payment to xiang li for these two programs. same thing. sent us download links later that day. xiang li was highly responsive. he was extremely attentive to customer relations. he would do whatever we needed him to do as long as we first paid him the money. >> that's the thing we noticed about him is that he was all about the money. >> so we downloaded the programs onto our laptop. we flew out to san jose, met with the company. they looked at it and they figured out that this was a working copy of their program. again, he had cracked the license file to make it work.