"A good liar nver goes too far out of his way to tell a lie, infact he'd tell the truth that cannot be disproved and everything but the last piece of the puzzle. He should tell all the truth except the most damning truth to him and thus convince people of his innocence and rebuke their suspicion back to themselves. For why should a guilty man embrace this psychology unless he was ill informed or had no reason to believe himself under suspicion at all."
"Only a common breed of peasant would deny everything no matter how probable the evidence for even a slither of evidence should point in the opposite direction for all people surrounding the event."
-Dostoyevsky... Or the gist.