People who are manipulative will use their hands to illustrate their point before they make their point.

People who are telling the truth use their hands to illustrate their point as they begin speaking – before they make their point.  People who are being deceptive share their point verbally, then add hand movements to reinforce what they are saying. They have to concentrate more to share the lie verbally.  Once said, they can use their hands to bolster their point.