I would say that if you're caught and ... somehow manage to delete all the evidence linking you ( you have device explosives or, idk, 2048 bit encryption ), you may be able to escape, but come on, who are we kidding: the FBI has like a 99.96% conviction rate and that's without even going to into the "parallel construction" or other conspiratorial lines of attack.
I don't know if it's 99.96%, but the FBI is well-known for making sure everything is absolutely airtight before making an arrest. Once they make an arrest, you can be sure they have more than enough evidence to convict and then some. When people do avoid a conviction, it's usually by testifying against others in exchange for immunity or leniency.
