I always enjoy entertaining conspiracy theories, but in reality if you have a problem employee and evidence of them downloading your company's important info, and have legitimate concerns that they are going to take it elsewhere, would you not call the authorities/FBI?
Regardless, if you want to know the whole story, you can read the affidavit from the link which contains literally all of the details of exactly how this played out.
tl;dr - there's really not much more to the story, the summary is exactly what happened.