That's enough for a conviction right there. And yes, 5000 emails is a lot. But there were 650,000 emails on that laptop. What were they and how did they get there?
Obviously rank speculation but who has possession of the laptop that got "lost in the mail"? Was it Huma?
If so did she think "Hey, they're just gonna destroy this thing and Carlos has been whinning about wanting a new laptop, I'll just give it to him to shut him up."
650k emails could sure be the entire contents of a server. Perhaps the servers PST files were backed up on it?