The thrill of a crime story is the unfolding of “whodunnit,” often against a backdrop of very little evidence. Positively identifying a suspect, even with a photo of her face, is challenging enough. But what if the only evidence available is a grainy image of a suspect’s hand?

Thanks to a group at the University of Dundee in the UK, that’s enough information to positively ID the perp.

The Centre for Anatomy and Human Identification (CAHID) can assess vein patterns, scars, nail beds, sk