This excitation may involve inherent fluorescence and/or treatment with fluorescent dyes such as ninhydrin, DFO or rhodamine 6G. With fluorescence, light is absorbed in one wavelength band (color) and re-emitted in a longer wavelength band. The laser has long been recognized as the optimum light source to detect this fluorescence from latent evidence. The laser’s undisputed superiority is a result of several unique properties not available in lamp-based systems. The most important of these properties is spectral brightness. The Dual77 445nm/520nm Pistol Grip Investigation laser system is used to detect latent fingerprints and other evidence such as, bone fragments, footprints, bodily fluids, chemically treated prints and more.