An accessory after-the-fact is someone who, knowing a crime was committed, receives, relieves, comforts, or assists the offender or in any manner aids them to escape arrest or punishment.

Complicity is the act of helping or encouraging another individual to commit a crime. It is also commonly referred to as aiding and abetting. One who is complicit is said to be an accomplice. But, even though an accomplice does not actually commit the crime, his or her actions helped someone in the commission of the crime.

an accomplice is a person who actively participates in the commission of a crime, even if they take no part in the actual criminal offense.

The only question left to decide, to what degree of criminally are the FBI guilty of.