This is a many leveled skill.

Having interviewed more than a few crooks, I can’t say that I read people consciously, but when I get that “feeling ” I tend to listen closely.

Physical actions and movements, little things that catch the eye, sometimes is takes a split second,  others it takes years.

Some people never gain the ability,  others seem born with it.

No matter how many articles I read about it, I still can’t put it into words well.