Very much not true. Counter to the way we think America should work perhaps, but many people have gone to prison for lying to federal officials while not under

Very much not true. Counter to the way we think America should work perhaps, but many people have gone to prison for lying to federal officials while not under oath. Martha Stewart being one of the most famous. Your best strategy when confronted with uncomfortable questions by federal officials in the US is to say "I wish to consult with my attorney before answering any questions." The result might be a lot of unpleasantness and delay, but they cannot throw you in prison for saying those words.