There probably aren’t even really “files” per se, except in the sense there are bank records, phone transcripts, video and photos, etc, that all create a picture of totality of the crimes, according to experts I’ve read (just like all other court documents of investigations etc). There’s not a single list of names dates and crimes committed, most likely (or maybe there is, who knows?). My point is, it would be easy to scrub just enough to create confusion instead of clarity, and I think that is what has happened.