FBI Goes Rogue

The FBI, can easily insert fake documents into whatever they took from Mar-a-Lago. Unless the FBI created a file list on the night of their raid that documents exactly what they took, with at least two unbiased persons signing to attest to that file list being accurate, that pile of documents is now meaningless, anyone could have subtracted or added to it...

...It's called chain-of-custody and whatever documents the FBI now has is invalid without a proof of chain-of-custody, meaning specifying what was taken in detail, and who collected, handled, transferred, or analyzed evidence during the raid.