Abstract: A system and method for utilizing Raman spectroscopy to detect and identify a fluid sample or stain in situ to determine the presence of body fluids. A portable Raman spectrometer performs stand-off Raman spectroscopy on suspected body fluids to detect and identify their actual presence, such as blood or semen. The portable Raman spectrometer can include a stand-off attachment to allow the proper distance between the spectrometer and fluid sample for optimal visual and statistical analysis of spectral data.

Abstract: Systems and methods for detecting a cognitive diseases and/or impairments in humans are disclosed. The method may include providing a saliva sample from a human subject, and subjecting at least a portion of the saliva sample to a spectroscopic analysis to produce a sample spectroscopic signature. The method may also include analyzing the produced sample spectroscopic signature using a predetermined statistical model. The predetermined statistical model may be based on spectroscopic signatures for a plurality modeling samples, and the spectroscopic signatures for each of the plurality of modeling samples may be associated with one of a plurality of predetermined cognitive categories. Additionally, the method may include correlating the produced sample spectroscopic signature with one of the plurality of predetermined cognitive categories based on the spectroscopic signatures for each of the plurality of modeling samples of the predetermined statistical model.