Fingerprint test reveals if owner has touched drugs, explosives, and poisons

In today's edition of the journal Science, R. Graham Cooks, a professor of chemistry at Purdue University, describes a mass spectrometry technique that to test fingerprints to learn what the person has been touching, including drugs, explosives, and poisons.

Because the spatial resolution is on the order of the width of a human hair, the Desi technique did not just detect the presence of, for instance, cocaine on the surface, but literally showed a pattern of cocaine in the shape of the fingerprint, leaving no doubt who had left the cocaine behind.

Fingerprint test tells much more than identity (IHT)