ABSTRACT
Forensic light sources with various wavelengths of light are used as nondestructive latent print visualization tools and as methods for viewing fluorescent fingerprint powders and reagents. Oblique white light is the first step in processing items or surfaces for latent prints. Fluorescence is viewed through barrier filters (or safety glasses) of specific colors depending on the color of light used to view the reaction. The laboratory exercises in this chapter comprise processing an item of evidence with fluorescent powders and observing multiple fluorescent reagents with the appropriate wavelengths of light and barrier filters.
