Liars often make too much or too little eye contact and tend to speak without contractions. They may show signs of discomfort like turning away, rapid blinking, or fidgeting. Liars also stutter or hesitate more when speaking, provide unnecessary details without being asked, and get defensive rather than going on the offensive like innocent people tend to do. Watch for inconsistent explanations, overemphasis on minor details, and frequent self-touching of the face, throat, or mouth from potential liars.