COMMON SENSE
We know that liars will unconsciously distance themselves from their subject, The co-worker is doing that when, rather than using his colleague’s name, he says, “I told that woman I did not take her bagel.”
Qualifying language: Statements like “in all honesty” or “to tell you the truth” can be other telltale signs you’re being lied to. Now, it’s also true that many people use phrases like these innocently enough in conversation. But given their potential association with dishonesty.
Questionable content: Ask a deceptive person to tell their story, they’re going to pepper it with way too much detail in all kinds of irrelevant places,
Vocal characteristics: People who are lying may sound tense, and their voices may be more high-pitched than usual.