>I'm not going to claim to be an american law expert, but when the agencies can just say "nope" to evidence against them in said court of law, it becomes hard to claim strong legal protections. I may be wrong and misunderstanding the law, but it does seem like that. And as a shot in the dark here I doubt it got any better after the patriot act.
This is nonsense. In your example the court said "nope" to the defendant trying to push a conspiracy theory which could not possibly have exonerated him.
Here's a decent read on the Nacchio case without weird conspiracy theory bullshit https://truthonthemarket.com/2008/03/31/some-thoughts-on-the...