How do you know that?
How do you know that?
Person A talks to person B. Person B supports terrorism. Person B does not mention terrorism in any communication with person A. Therefore, person A knows nothing, has done nothing wrong, and has nothing to worry about.
How can you be so sure about that? Maybe the FBI thinks that A and B use some kind of code and B did mention terrorism to A. It's not about what really happened, it's about what the FBI thinks happened.
"knows nothing, has done nothing wrong" does not imply "has nothing to worry about".
Lest we forget, this is the same agency that -- until caught fairly recently, and for decades -- invented, practiced, and promoted to other law enforcement agencies an entire fraudulent field of "science" just so that law enforcement could pretend there was evidence linking people to crimes without any real basis. [0]
[0] http://www.slate.com/articles/news_and_politics/jurisprudenc...