perceivable

ymmärrettävä

havaittava Capable of being perceived; discernible.
1818, w:Jane Austen|Jane Austen, Northanger Abbey, ch. 5,

Every search for him was equally unsuccessful, in morning lounges or evening assemblies; neither at the Upper nor Lower Rooms, at dressed or undressed balls, was he perceivable.

The only perceivable difference between the AP and FBI photos is that the man in the FBI photo is clean-shaven and shorter-haired.