My other comment is below. Have you read the complaint? The government is claiming that there is essentially 8 years of evidence on that VM, that in addition to the actual CP, there is a long trail of metadata and inode data that would be fairly difficult to fake.

I mean, think about it: if you were the defendant, all you'd have to do is have someone examine it and find inode activity when you had a clear alibi that the government didn't know about (which would be easy, given we're talking 8 years here, he'd just have to find when he was on a date or out to dinner or something, the government isn't going to know his entire life history for 8 years), and you'd be well on your way to creating enough doubt with a jury.

Now, it's possible the government is lying, but if they're not, it strains credulity to think that they'd go to the effort, cost, and risk to fake that VM in such elaborate detail. If they wanted to ruin his life, there are hundreds of easier ways to do it than such an elaborate fraud.