I am not an expert but I can identify a liar when I see one and I ain’t gonna be close to that person.
Here are the signs (in my view of course):
1) No eye contact
Hello. I am talking to you but why can’t you make eye contact with me unless you are lying.
The person has one body part constantly moving because he or she is obviously nervous. Relax bro/sis… Please lie well next time.
This gives the liar time to think of a lie. Some can come up with a good lie while others just simply fail at it.
Be very aware around me because I could be reading off you like a book.