Fingerprint Investigation Training

All fingerprints share the same basic structures and patterns.

Fingerprint investigations involve techniques for finding, producing and lifting latent fingerprints from a variety of environments as well as methods for cataloging and searching for these fingerprints through databases such as the Automated Fingerprint Identification System (AFIS).

Shapes and Patterns

Recognizing and distinguishing between loop and arch patterns, whorls, curves and other fingerprint features is one of the first lessons potential fingerprint investigators learn. As they progress in their studies, students learn to determine which appendage (finger) the print came from based on these features.

Finding and Lifting Prints

Latent prints may be found throughout a crime scene. Potential investigators receive training on traditional dusting methods for finding and lifting fingerprints as well as techniques such as using superglue, light sources, small particle reagent and photography. A variety of other methods are also learned that are used to find and remove prints from different types of crimes scenes, including arson sites, and from different surfaces, including wet surfaces.

Searching for Sources

Fingerprint investigation training also includes methods for matching fingerprints from crime scenes to people who may become suspects in a case. This often involves the use of computers and a large fingerprint database known as AFIS. AFIS contains information on fingerprints as well as palm prints, and the database is growing as more law enforcement agencies add to the content pool.

References

• National Legal Aid & Defense Organization: FBI Fingerprint Training Manual
• Police New South Wales: AFIS and the New Australian NAFIS
• Stapleton & Associates: Forensics Training & Consulting Resources