Not everyone has such an obvious identification feature, but everyone has their own individual look. Try to focus on the first thing that catches your eye about the individual. You can practice this technique by observing people living their everyday lives. Look around you and consider what makes a certain person look the way he or she does. You will find that it is usually one or two features that are the dominate makeup of that individual's look.
Eyes are usually the most and only visible feature on a suspect.
Look at the suspect's eyes, do not stare but take in the uniqueness of the eyes. Consider size, shape, color, whether they are close or far apart, perhaps they are deep-set, and consider how close the eyebrows rest above the eyes. While observing the eyes, notice the eyebrow thickness and shape. An individual's head shape is another excellent identification point. Look for peculiarities on the individual's hairstyle, whether or not facial hair is present.