Recent research shows that hesitation, shifting posture, and failure to maintain eye contact are not reliable indicators in discriminating between those who are lying and those who are telling the truth  The research indicates that behavior that cannot be controlled is a much better clue, at least when the lie is important to the liar
Such behavior includes the dilation of eye pupils, which indicates emotional arousal, and small movements of facial muscles, which indicate distress, fear, or anger
A practiced liar might have achieved great control over body posture and eye contact.