How Fingerprinting Works
Submitted: Apr 15, 2008 - Detectives arrive at a crime scene and lift fingerprints from the murder weapon. They'll use these oily markings to catch their criminal. But how do they match the print to the killer?
Fingerprinting has come a long way from the days when police officers lifted prints from a crime scene and checked them manually against their files. Modern fingerprinting techniques can not only check millions…

