Here's what it is according to former FBI operative. You spill your guts and tell everything you know including what YOU have done no matter how criminal or illegal. AS LONG AS YOU TELL THE TRUTH the FBI will not use what you tell them against you. It's a get-out-of-jail free card. However if you lie all bets are off and what you tell then will be used against you. So you're the Queen and under oath to be truthful. Are you? 100%? No matter how much you are involved? You don't lie because to do so would be really STUPID. Of course liars are always stupid aren't they? Especially those who lie to the FBI!