Techniques
Fingerprinting techniques have come along way from it first started. In the beginning the Henry System was the main tool for identification of individual fingerprinting analysis meaning the arresting officer would have to manually compare prints taking them hours and even days. As technology advanced the FBI realized they needed a more automated system that could process fingerprints fast and accurately. Fortunately the Japanese were able to establishing the first electronic fingerprint matching system in the 1980s. Their Automated Fingerprint Identification Systems (AFIS), eventually enabled law enforcement officials around the world to cross-check a print with millions of fingerprint records almost instantaneously. Which lead to the the introduction of Integrated AFIS (IAFIS). This system is maintained by the FBI's Criminal Justice Information Services Division. It can categorize, search and retrieve fingerprints from virtually anywhere in the country in as little as 30 minutes. It also includes mug shots and criminal histories on some 47 million people. IAFIS allows local, state and federal law enforcement agencies to have access to the same huge database of information.
Fingerprinting techniques have come along way from it first started. In the beginning the Henry System was the main tool for identification of individual fingerprinting analysis meaning the arresting officer would have to manually compare prints taking them hours and even days. As technology advanced the FBI realized they needed a more automated system that could process fingerprints fast and accurately. Fortunately the Japanese were able to establishing the first electronic fingerprint matching system in the 1980s. Their Automated Fingerprint Identification Systems (AFIS), eventually enabled law enforcement officials around the world to cross-check a print with millions of fingerprint records almost instantaneously. Which lead to the the introduction of Integrated AFIS (IAFIS). This system is maintained by the FBI's Criminal Justice Information Services Division. It can categorize, search and retrieve fingerprints from virtually anywhere in the country in as little as 30 minutes. It also includes mug shots and criminal histories on some 47 million people. IAFIS allows local, state and federal law enforcement agencies to have access to the same huge database of information.
As far as lifting the fingerprints from a crime scene or such takes a different process with different chemicals.Experienced examiners find that black and gray powders are satisfactory for most latent print work. Therefore, the black powder, composed of black carbon or charcoal, is applied to white or light-colored surfaces. The gray powder, composed basically of an aluminum dust, is used on dark-colored surfaces; it is also applied to mirrors and metal surfaces that are polished to a mirror-like finish, because these surfaces will photograph black. These powders are applied lightly to a nonabsorbent surface with a fiberglass or camel's-hair brush, and will stick to perspiration residues and/or deposits of body oils left on the surface. In class we used talc or commonly known as baby powder to lift frints from a dark surface, then placing it on a dark sheet of paper to futher analys.http://science.howstuffworks.com/fingerprinting4.htm
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