Ambient sampling, portable mass spectroscopy (MS) systems have the potential to enable field processing of forensic evidence, as well as serve as a flexible investigative tool during routine law enforcement activities; however, the underlying legal implications of evidentiary data require the discretion of practitioners to ensure both lawful and ethical usage. Specific applications include the detection and identification of trace level contraband found as surface residues on automotive surfaces, in the presence of latent fingerprints, and in conjunction with emerging evidence types like adulterated beverages and electronic cigarette liquids. In addition, the current state of U.S. search and seizure law was examined to discern the presumed legal usage modes from the full analytical potential of the technique. These studies, in turn, can assist in predetermining the investigatory and legal impacts of field deployment of similar instrumentation in policing activities. (publisher abstract modified)
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