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Please be aware that this content contains descriptions of violence that may be distressing to some viewers.Since the detection and identification of blood, semen and saliva stains, the most common body fluids encountered at a crime scene, are important aspects of forensic science, the current study aimed to develop a nondestructive, confirmatory method for body-fluid identification based on Raman spectroscopy coupled with advanced statistical analysis.
Dry traces of blood, semen and saliva obtained from multiple donors were probed using a confocal Raman microscope with a 785-nm excitation wavelength under controlled laboratory conditions. Results demonstrated, with high confidence, the capability of Raman spectroscopy to identify an unknown substance to be semen, blood or saliva. 5 figures, 1 table, and 75 references (publisher abstract modified)
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