Anything that is not seen under the clothes, I assume.
- skin disease (e.g. psoriasis)
- tattoos
- scars
- Maybe, evidence of a certain prior illness?
- or some problem leading to unusual gait?
- certain asymmetry of R and L foot?
- he spat on the bridge. We don’t know what was in the sputum (Tb? Lung cancer?)
- last but not least, vasectomy, or issues causing impotence?
I can only imagine (and the easiest answer is obvious - whoever the witnesses saw was so high on stimulants that his pupils were wide).
However, I hope, and hence, imagine. In Parabon’s phenotypic analysis, if the eye color would come as “green/hazel”, as it sometimes happens, they’d have to say, “unknown”.