Researchers have figured out a way to identify fingerprints left on metals even after they have been wiped clean. By applying a fine conducting powder to a gun or bullet casing, the fingerprint reveals itself after an electric charge is applied.
Dr. John Bond, a forensic research scientist at the University of Leicester, developed the technique and is now looking into the possibility of it being able to work on bomb fragments.
The technique is based on how fingerprints corrode metal surfaces. Even though the corrosion is minimal, the conducting powder is attracted to the fingerprint. Bad news for Dr. No, Goldfinger, et al.