Balloon Boy Mommy and Daddy : Liespotting the cover-up- How to tell if nsomeone is lying

" I swear he was right there next to me!" --Thats a deception clue--when you hear " I swear" consider it a red flag to ask more questions. Interrogators know that when they hear " I swear..." a big lie is on the way. Interrogators also know that honest people when wrongly accused get visibly angry. Here Balloon Boy Mommy and Daddy issue the weakest of denials. What other clues to deception do you see?