Volume 29, Issue 1 (January 1984)
Room Light and Laser Development of Latent Fingerprints with Enzymes
A very pronounced enhancement in detectability of reasonably fresh latent finger-prints is obtained when the ninhydrin method is combined with enzyme treatment. Specifically, trypsin and pronase were found to be effective, particularly the former. When ridge detail in room light remains inadequate even upon enzyme treatment, laser examination following zinc chloride treatment can produce strong additional enhancement to render such prints identificable. Our results with older prints have been marginal to date. Reasons for this and directions for future study are discussed.